2c162f9b41722 (Thomas Gleixner 2019-06-03 07:45:02 +0200 1) // SPDX-License-Identifier: GPL-2.0-only
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 2) /*
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 3) * RackMac vu-meter driver
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 4) *
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 5) * (c) Copyright 2006 Benjamin Herrenschmidt, IBM Corp.
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 6) * <benh@kernel.crashing.org>
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 7) *
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 8) * Support the CPU-meter LEDs of the Xserve G5
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 9) *
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 10) * TODO: Implement PWM to do variable intensity and provide userland
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 11) * interface for fun. Also, the CPU-meter could be made nicer by being
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 12) * a bit less "immediate" but giving instead a more average load over
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 13) * time. Patches welcome :-)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 14) */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 15) #undef DEBUG
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 16)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 17) #include <linux/types.h>
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 18) #include <linux/kernel.h>
5a0e3ad6af866 (Tejun Heo 2010-03-24 17:04:11 +0900 19) #include <linux/slab.h>
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 20) #include <linux/device.h>
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 21) #include <linux/interrupt.h>
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 22) #include <linux/module.h>
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 23) #include <linux/pci.h>
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 24) #include <linux/dma-mapping.h>
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 25) #include <linux/kernel_stat.h>
5af5073004071 (Rob Herring 2013-09-17 14:28:33 -0500 26) #include <linux/of_address.h>
5af5073004071 (Rob Herring 2013-09-17 14:28:33 -0500 27) #include <linux/of_irq.h>
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 28)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 29) #include <asm/io.h>
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 30) #include <asm/prom.h>
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 31) #include <asm/machdep.h>
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 32) #include <asm/pmac_feature.h>
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 33) #include <asm/dbdma.h>
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 34) #include <asm/macio.h>
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 35) #include <asm/keylargo.h>
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 36)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 37) /* Number of samples in a sample buffer */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 38) #define SAMPLE_COUNT 256
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 39)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 40) /* CPU meter sampling rate in ms */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 41) #define CPU_SAMPLING_RATE 250
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 42)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 43) struct rackmeter_dma {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 44) struct dbdma_cmd cmd[4] ____cacheline_aligned;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 45) u32 mark ____cacheline_aligned;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 46) u32 buf1[SAMPLE_COUNT] ____cacheline_aligned;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 47) u32 buf2[SAMPLE_COUNT] ____cacheline_aligned;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 48) } ____cacheline_aligned;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 49)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 50) struct rackmeter_cpu {
6d5aefb8eaa38 (David Howells 2006-12-05 19:36:26 +0000 51) struct delayed_work sniffer;
6d5aefb8eaa38 (David Howells 2006-12-05 19:36:26 +0000 52) struct rackmeter *rm;
564b733c899f4 (Frederic Weisbecker 2017-01-31 04:09:20 +0100 53) u64 prev_wall;
564b733c899f4 (Frederic Weisbecker 2017-01-31 04:09:20 +0100 54) u64 prev_idle;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 55) int zero;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 56) } ____cacheline_aligned;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 57)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 58) struct rackmeter {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 59) struct macio_dev *mdev;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 60) unsigned int irq;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 61) struct device_node *i2s;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 62) u8 *ubuf;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 63) struct dbdma_regs __iomem *dma_regs;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 64) void __iomem *i2s_regs;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 65) dma_addr_t dma_buf_p;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 66) struct rackmeter_dma *dma_buf_v;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 67) int stale_irq;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 68) struct rackmeter_cpu cpu[2];
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 69) int paused;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 70) struct mutex sem;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 71) };
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 72)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 73) /* To be set as a tunable */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 74) static int rackmeter_ignore_nice;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 75)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 76) /* This GPIO is whacked by the OS X driver when initializing */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 77) #define RACKMETER_MAGIC_GPIO 0x78
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 78)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 79) /* This is copied from cpufreq_ondemand, maybe we should put it in
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 80) * a common header somewhere
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 81) */
564b733c899f4 (Frederic Weisbecker 2017-01-31 04:09:20 +0100 82) static inline u64 get_cpu_idle_time(unsigned int cpu)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 83) {
8392853e964c0 (Frederic Weisbecker 2019-11-21 03:44:30 +0100 84) struct kernel_cpustat *kcpustat = &kcpustat_cpu(cpu);
3292beb340c76 (Glauber Costa 2011-11-28 14:45:17 -0200 85) u64 retval;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 86)
8392853e964c0 (Frederic Weisbecker 2019-11-21 03:44:30 +0100 87) retval = kcpustat->cpustat[CPUTIME_IDLE] +
8392853e964c0 (Frederic Weisbecker 2019-11-21 03:44:30 +0100 88) kcpustat->cpustat[CPUTIME_IOWAIT];
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 89)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 90) if (rackmeter_ignore_nice)
8392853e964c0 (Frederic Weisbecker 2019-11-21 03:44:30 +0100 91) retval += kcpustat_field(kcpustat, CPUTIME_NICE, cpu);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 92)
564b733c899f4 (Frederic Weisbecker 2017-01-31 04:09:20 +0100 93) return retval;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 94) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 95)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 96) static void rackmeter_setup_i2s(struct rackmeter *rm)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 97) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 98) struct macio_chip *macio = rm->mdev->bus->chip;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 99)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 100) /* First whack magic GPIO */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 101) pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, RACKMETER_MAGIC_GPIO, 5);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 102)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 103)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 104) /* Call feature code to enable the sound channel and the proper
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 105) * clock sources
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 106) */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 107) pmac_call_feature(PMAC_FTR_SOUND_CHIP_ENABLE, rm->i2s, 0, 1);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 108)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 109) /* Power i2s and stop i2s clock. We whack MacIO FCRs directly for now.
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 110) * This is a bit racy, thus we should add new platform functions to
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 111) * handle that. snd-aoa needs that too
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 112) */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 113) MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_ENABLE);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 114) MACIO_BIC(KEYLARGO_FCR1, KL1_I2S0_CLK_ENABLE_BIT);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 115) (void)MACIO_IN32(KEYLARGO_FCR1);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 116) udelay(10);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 117)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 118) /* Then setup i2s. For now, we use the same magic value that
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 119) * the OS X driver seems to use. We might want to play around
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 120) * with the clock divisors later
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 121) */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 122) out_le32(rm->i2s_regs + 0x10, 0x01fa0000);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 123) (void)in_le32(rm->i2s_regs + 0x10);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 124) udelay(10);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 125)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 126) /* Fully restart i2s*/
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 127) MACIO_BIS(KEYLARGO_FCR1, KL1_I2S0_CELL_ENABLE |
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 128) KL1_I2S0_CLK_ENABLE_BIT);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 129) (void)MACIO_IN32(KEYLARGO_FCR1);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 130) udelay(10);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 131) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 132)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 133) static void rackmeter_set_default_pattern(struct rackmeter *rm)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 134) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 135) int i;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 136)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 137) for (i = 0; i < 16; i++) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 138) if (i < 8)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 139) rm->ubuf[i] = (i & 1) * 255;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 140) else
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 141) rm->ubuf[i] = ((~i) & 1) * 255;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 142) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 143) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 144)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 145) static void rackmeter_do_pause(struct rackmeter *rm, int pause)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 146) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 147) struct rackmeter_dma *rdma = rm->dma_buf_v;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 148)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 149) pr_debug("rackmeter: %s\n", pause ? "paused" : "started");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 150)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 151) rm->paused = pause;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 152) if (pause) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 153) DBDMA_DO_STOP(rm->dma_regs);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 154) return;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 155) }
e283655b5abe2 (Aaro Koskinen 2018-03-16 22:17:28 +0200 156) memset(rdma->buf1, 0, sizeof(rdma->buf1));
e283655b5abe2 (Aaro Koskinen 2018-03-16 22:17:28 +0200 157) memset(rdma->buf2, 0, sizeof(rdma->buf2));
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 158)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 159) rm->dma_buf_v->mark = 0;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 160)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 161) mb();
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 162) out_le32(&rm->dma_regs->cmdptr_hi, 0);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 163) out_le32(&rm->dma_regs->cmdptr, rm->dma_buf_p);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 164) out_le32(&rm->dma_regs->control, (RUN << 16) | RUN);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 165) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 166)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 167) static void rackmeter_setup_dbdma(struct rackmeter *rm)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 168) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 169) struct rackmeter_dma *db = rm->dma_buf_v;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 170) struct dbdma_cmd *cmd = db->cmd;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 171)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 172) /* Make sure dbdma is reset */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 173) DBDMA_DO_RESET(rm->dma_regs);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 174)
193d0732920fd (Al Viro 2007-02-09 16:39:05 +0000 175) pr_debug("rackmeter: mark offset=0x%zx\n",
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 176) offsetof(struct rackmeter_dma, mark));
193d0732920fd (Al Viro 2007-02-09 16:39:05 +0000 177) pr_debug("rackmeter: buf1 offset=0x%zx\n",
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 178) offsetof(struct rackmeter_dma, buf1));
193d0732920fd (Al Viro 2007-02-09 16:39:05 +0000 179) pr_debug("rackmeter: buf2 offset=0x%zx\n",
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 180) offsetof(struct rackmeter_dma, buf2));
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 181)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 182) /* Prepare 4 dbdma commands for the 2 buffers */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 183) memset(cmd, 0, 4 * sizeof(struct dbdma_cmd));
f5718726714cd (David Gibson 2015-02-03 16:36:21 +1100 184) cmd->req_count = cpu_to_le16(4);
f5718726714cd (David Gibson 2015-02-03 16:36:21 +1100 185) cmd->command = cpu_to_le16(STORE_WORD | INTR_ALWAYS | KEY_SYSTEM);
f5718726714cd (David Gibson 2015-02-03 16:36:21 +1100 186) cmd->phy_addr = cpu_to_le32(rm->dma_buf_p +
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 187) offsetof(struct rackmeter_dma, mark));
f5718726714cd (David Gibson 2015-02-03 16:36:21 +1100 188) cmd->cmd_dep = cpu_to_le32(0x02000000);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 189) cmd++;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 190)
f5718726714cd (David Gibson 2015-02-03 16:36:21 +1100 191) cmd->req_count = cpu_to_le16(SAMPLE_COUNT * 4);
f5718726714cd (David Gibson 2015-02-03 16:36:21 +1100 192) cmd->command = cpu_to_le16(OUTPUT_MORE);
f5718726714cd (David Gibson 2015-02-03 16:36:21 +1100 193) cmd->phy_addr = cpu_to_le32(rm->dma_buf_p +
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 194) offsetof(struct rackmeter_dma, buf1));
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 195) cmd++;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 196)
f5718726714cd (David Gibson 2015-02-03 16:36:21 +1100 197) cmd->req_count = cpu_to_le16(4);
f5718726714cd (David Gibson 2015-02-03 16:36:21 +1100 198) cmd->command = cpu_to_le16(STORE_WORD | INTR_ALWAYS | KEY_SYSTEM);
f5718726714cd (David Gibson 2015-02-03 16:36:21 +1100 199) cmd->phy_addr = cpu_to_le32(rm->dma_buf_p +
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 200) offsetof(struct rackmeter_dma, mark));
f5718726714cd (David Gibson 2015-02-03 16:36:21 +1100 201) cmd->cmd_dep = cpu_to_le32(0x01000000);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 202) cmd++;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 203)
f5718726714cd (David Gibson 2015-02-03 16:36:21 +1100 204) cmd->req_count = cpu_to_le16(SAMPLE_COUNT * 4);
f5718726714cd (David Gibson 2015-02-03 16:36:21 +1100 205) cmd->command = cpu_to_le16(OUTPUT_MORE | BR_ALWAYS);
f5718726714cd (David Gibson 2015-02-03 16:36:21 +1100 206) cmd->phy_addr = cpu_to_le32(rm->dma_buf_p +
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 207) offsetof(struct rackmeter_dma, buf2));
f5718726714cd (David Gibson 2015-02-03 16:36:21 +1100 208) cmd->cmd_dep = cpu_to_le32(rm->dma_buf_p);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 209)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 210) rackmeter_do_pause(rm, 0);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 211) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 212)
6d5aefb8eaa38 (David Howells 2006-12-05 19:36:26 +0000 213) static void rackmeter_do_timer(struct work_struct *work)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 214) {
6d5aefb8eaa38 (David Howells 2006-12-05 19:36:26 +0000 215) struct rackmeter_cpu *rcpu =
6d5aefb8eaa38 (David Howells 2006-12-05 19:36:26 +0000 216) container_of(work, struct rackmeter_cpu, sniffer.work);
6d5aefb8eaa38 (David Howells 2006-12-05 19:36:26 +0000 217) struct rackmeter *rm = rcpu->rm;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 218) unsigned int cpu = smp_processor_id();
564b733c899f4 (Frederic Weisbecker 2017-01-31 04:09:20 +0100 219) u64 cur_nsecs, total_idle_nsecs;
564b733c899f4 (Frederic Weisbecker 2017-01-31 04:09:20 +0100 220) u64 total_nsecs, idle_nsecs;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 221) int i, offset, load, cumm, pause;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 222)
564b733c899f4 (Frederic Weisbecker 2017-01-31 04:09:20 +0100 223) cur_nsecs = jiffies64_to_nsecs(get_jiffies_64());
564b733c899f4 (Frederic Weisbecker 2017-01-31 04:09:20 +0100 224) total_nsecs = cur_nsecs - rcpu->prev_wall;
564b733c899f4 (Frederic Weisbecker 2017-01-31 04:09:20 +0100 225) rcpu->prev_wall = cur_nsecs;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 226)
564b733c899f4 (Frederic Weisbecker 2017-01-31 04:09:20 +0100 227) total_idle_nsecs = get_cpu_idle_time(cpu);
564b733c899f4 (Frederic Weisbecker 2017-01-31 04:09:20 +0100 228) idle_nsecs = total_idle_nsecs - rcpu->prev_idle;
564b733c899f4 (Frederic Weisbecker 2017-01-31 04:09:20 +0100 229) idle_nsecs = min(idle_nsecs, total_nsecs);
564b733c899f4 (Frederic Weisbecker 2017-01-31 04:09:20 +0100 230) rcpu->prev_idle = total_idle_nsecs;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 231)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 232) /* We do a very dumb calculation to update the LEDs for now,
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 233) * we'll do better once we have actual PWM implemented
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 234) */
564b733c899f4 (Frederic Weisbecker 2017-01-31 04:09:20 +0100 235) load = div64_u64(9 * (total_nsecs - idle_nsecs), total_nsecs);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 236)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 237) offset = cpu << 3;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 238) cumm = 0;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 239) for (i = 0; i < 8; i++) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 240) u8 ub = (load > i) ? 0xff : 0;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 241) rm->ubuf[i + offset] = ub;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 242) cumm |= ub;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 243) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 244) rcpu->zero = (cumm == 0);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 245)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 246) /* Now check if LEDs are all 0, we can stop DMA */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 247) pause = (rm->cpu[0].zero && rm->cpu[1].zero);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 248) if (pause != rm->paused) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 249) mutex_lock(&rm->sem);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 250) pause = (rm->cpu[0].zero && rm->cpu[1].zero);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 251) rackmeter_do_pause(rm, pause);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 252) mutex_unlock(&rm->sem);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 253) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 254) schedule_delayed_work_on(cpu, &rcpu->sniffer,
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 255) msecs_to_jiffies(CPU_SAMPLING_RATE));
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 256) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 257)
1da42fb6bf6fc (Greg Kroah-Hartman 2012-12-21 15:03:50 -0800 258) static void rackmeter_init_cpu_sniffer(struct rackmeter *rm)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 259) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 260) unsigned int cpu;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 261)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 262) /* This driver works only with 1 or 2 CPUs numbered 0 and 1,
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 263) * but that's really all we have on Apple Xserve. It doesn't
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 264) * play very nice with CPU hotplug neither but we don't do that
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 265) * on those machines yet
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 266) */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 267)
6d5aefb8eaa38 (David Howells 2006-12-05 19:36:26 +0000 268) rm->cpu[0].rm = rm;
6d5aefb8eaa38 (David Howells 2006-12-05 19:36:26 +0000 269) INIT_DELAYED_WORK(&rm->cpu[0].sniffer, rackmeter_do_timer);
6d5aefb8eaa38 (David Howells 2006-12-05 19:36:26 +0000 270) rm->cpu[1].rm = rm;
6d5aefb8eaa38 (David Howells 2006-12-05 19:36:26 +0000 271) INIT_DELAYED_WORK(&rm->cpu[1].sniffer, rackmeter_do_timer);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 272)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 273) for_each_online_cpu(cpu) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 274) struct rackmeter_cpu *rcpu;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 275)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 276) if (cpu > 1)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 277) continue;
a419aef8b858a (Joe Perches 2009-08-18 11:18:35 -0700 278) rcpu = &rm->cpu[cpu];
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 279) rcpu->prev_idle = get_cpu_idle_time(cpu);
564b733c899f4 (Frederic Weisbecker 2017-01-31 04:09:20 +0100 280) rcpu->prev_wall = jiffies64_to_nsecs(get_jiffies_64());
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 281) schedule_delayed_work_on(cpu, &rm->cpu[cpu].sniffer,
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 282) msecs_to_jiffies(CPU_SAMPLING_RATE));
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 283) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 284) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 285)
e1f4dea454c8e (Grant Likely 2011-02-28 09:59:31 +0000 286) static void rackmeter_stop_cpu_sniffer(struct rackmeter *rm)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 287) {
afe2c511fb2d7 (Tejun Heo 2010-12-14 16:21:17 +0100 288) cancel_delayed_work_sync(&rm->cpu[0].sniffer);
afe2c511fb2d7 (Tejun Heo 2010-12-14 16:21:17 +0100 289) cancel_delayed_work_sync(&rm->cpu[1].sniffer);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 290) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 291)
1da42fb6bf6fc (Greg Kroah-Hartman 2012-12-21 15:03:50 -0800 292) static int rackmeter_setup(struct rackmeter *rm)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 293) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 294) pr_debug("rackmeter: setting up i2s..\n");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 295) rackmeter_setup_i2s(rm);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 296)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 297) pr_debug("rackmeter: setting up default pattern..\n");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 298) rackmeter_set_default_pattern(rm);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 299)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 300) pr_debug("rackmeter: setting up dbdma..\n");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 301) rackmeter_setup_dbdma(rm);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 302)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 303) pr_debug("rackmeter: start CPU measurements..\n");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 304) rackmeter_init_cpu_sniffer(rm);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 305)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 306) printk(KERN_INFO "RackMeter initialized\n");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 307)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 308) return 0;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 309) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 310)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 311) /* XXX FIXME: No PWM yet, this is 0/1 */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 312) static u32 rackmeter_calc_sample(struct rackmeter *rm, unsigned int index)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 313) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 314) int led;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 315) u32 sample = 0;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 316)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 317) for (led = 0; led < 16; led++) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 318) sample >>= 1;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 319) sample |= ((rm->ubuf[led] >= 0x80) << 15);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 320) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 321) return (sample << 17) | (sample >> 15);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 322) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 323)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 324) static irqreturn_t rackmeter_irq(int irq, void *arg)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 325) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 326) struct rackmeter *rm = arg;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 327) struct rackmeter_dma *db = rm->dma_buf_v;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 328) unsigned int mark, i;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 329) u32 *buf;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 330)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 331) /* Flush PCI buffers with an MMIO read. Maybe we could actually
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 332) * check the status one day ... in case things go wrong, though
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 333) * this never happened to me
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 334) */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 335) (void)in_le32(&rm->dma_regs->status);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 336)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 337) /* Make sure the CPU gets us in order */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 338) rmb();
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 339)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 340) /* Read mark */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 341) mark = db->mark;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 342) if (mark != 1 && mark != 2) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 343) printk(KERN_WARNING "rackmeter: Incorrect DMA mark 0x%08x\n",
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 344) mark);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 345) /* We allow for 3 errors like that (stale DBDMA irqs) */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 346) if (++rm->stale_irq > 3) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 347) printk(KERN_ERR "rackmeter: Too many errors,"
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 348) " stopping DMA\n");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 349) DBDMA_DO_RESET(rm->dma_regs);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 350) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 351) return IRQ_HANDLED;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 352) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 353)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 354) /* Next buffer we need to fill is mark value */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 355) buf = mark == 1 ? db->buf1 : db->buf2;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 356)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 357) /* Fill it now. This routine converts the 8 bits depth sample array
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 358) * into the PWM bitmap for each LED.
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 359) */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 360) for (i = 0; i < SAMPLE_COUNT; i++)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 361) buf[i] = rackmeter_calc_sample(rm, i);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 362)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 363)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 364) return IRQ_HANDLED;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 365) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 366)
1da42fb6bf6fc (Greg Kroah-Hartman 2012-12-21 15:03:50 -0800 367) static int rackmeter_probe(struct macio_dev* mdev,
1da42fb6bf6fc (Greg Kroah-Hartman 2012-12-21 15:03:50 -0800 368) const struct of_device_id *match)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 369) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 370) struct device_node *i2s = NULL, *np = NULL;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 371) struct rackmeter *rm = NULL;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 372) struct resource ri2s, rdma;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 373) int rc = -ENODEV;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 374)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 375) pr_debug("rackmeter_probe()\n");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 376)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 377) /* Get i2s-a node */
f1e0addca8bd7 (Rob Herring 2018-12-05 13:50:28 -0600 378) for_each_child_of_node(mdev->ofdev.dev.of_node, i2s)
f1e0addca8bd7 (Rob Herring 2018-12-05 13:50:28 -0600 379) if (of_node_name_eq(i2s, "i2s-a"))
f1e0addca8bd7 (Rob Herring 2018-12-05 13:50:28 -0600 380) break;
f1e0addca8bd7 (Rob Herring 2018-12-05 13:50:28 -0600 381)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 382) if (i2s == NULL) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 383) pr_debug(" i2s-a child not found\n");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 384) goto bail;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 385) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 386) /* Get lightshow or virtual sound */
f1e0addca8bd7 (Rob Herring 2018-12-05 13:50:28 -0600 387) for_each_child_of_node(i2s, np) {
f1e0addca8bd7 (Rob Herring 2018-12-05 13:50:28 -0600 388) if (of_node_name_eq(np, "lightshow"))
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 389) break;
f1e0addca8bd7 (Rob Herring 2018-12-05 13:50:28 -0600 390) if (of_node_name_eq(np, "sound") &&
01b2726dd11ef (Stephen Rothwell 2007-04-27 13:41:15 +1000 391) of_get_property(np, "virtual", NULL) != NULL)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 392) break;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 393) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 394) if (np == NULL) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 395) pr_debug(" lightshow or sound+virtual child not found\n");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 396) goto bail;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 397) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 398)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 399) /* Create and initialize our instance data */
a0828cf57acce (Markus Elfring 2017-01-19 17:15:30 +0100 400) rm = kzalloc(sizeof(*rm), GFP_KERNEL);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 401) if (rm == NULL) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 402) printk(KERN_ERR "rackmeter: failed to allocate memory !\n");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 403) rc = -ENOMEM;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 404) goto bail_release;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 405) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 406) rm->mdev = mdev;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 407) rm->i2s = i2s;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 408) mutex_init(&rm->sem);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 409) dev_set_drvdata(&mdev->ofdev.dev, rm);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 410) /* Check resources availability. We need at least resource 0 and 1 */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 411) #if 0 /* Use that when i2s-a is finally an mdev per-se */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 412) if (macio_resource_count(mdev) < 2 || macio_irq_count(mdev) < 2) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 413) printk(KERN_ERR
b6a945ae03fd3 (Rob Herring 2017-07-18 16:43:12 -0500 414) "rackmeter: found match but lacks resources: %pOF"
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 415) " (%d resources, %d interrupts)\n",
b6a945ae03fd3 (Rob Herring 2017-07-18 16:43:12 -0500 416) mdev->ofdev.dev.of_node);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 417) rc = -ENXIO;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 418) goto bail_free;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 419) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 420) if (macio_request_resources(mdev, "rackmeter")) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 421) printk(KERN_ERR
b6a945ae03fd3 (Rob Herring 2017-07-18 16:43:12 -0500 422) "rackmeter: failed to request resources: %pOF\n",
b6a945ae03fd3 (Rob Herring 2017-07-18 16:43:12 -0500 423) mdev->ofdev.dev.of_node);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 424) rc = -EBUSY;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 425) goto bail_free;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 426) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 427) rm->irq = macio_irq(mdev, 1);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 428) #else
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 429) rm->irq = irq_of_parse_and_map(i2s, 1);
ef24ba7091517 (Michael Ellerman 2016-09-06 21:53:24 +1000 430) if (!rm->irq ||
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 431) of_address_to_resource(i2s, 0, &ri2s) ||
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 432) of_address_to_resource(i2s, 1, &rdma)) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 433) printk(KERN_ERR
b6a945ae03fd3 (Rob Herring 2017-07-18 16:43:12 -0500 434) "rackmeter: found match but lacks resources: %pOF",
b6a945ae03fd3 (Rob Herring 2017-07-18 16:43:12 -0500 435) mdev->ofdev.dev.of_node);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 436) rc = -ENXIO;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 437) goto bail_free;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 438) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 439) #endif
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 440)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 441) pr_debug(" i2s @0x%08x\n", (unsigned int)ri2s.start);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 442) pr_debug(" dma @0x%08x\n", (unsigned int)rdma.start);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 443) pr_debug(" irq %d\n", rm->irq);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 444)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 445) rm->ubuf = (u8 *)__get_free_page(GFP_KERNEL);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 446) if (rm->ubuf == NULL) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 447) printk(KERN_ERR
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 448) "rackmeter: failed to allocate samples page !\n");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 449) rc = -ENOMEM;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 450) goto bail_release;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 451) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 452)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 453) rm->dma_buf_v = dma_alloc_coherent(&macio_get_pci_dev(mdev)->dev,
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 454) sizeof(struct rackmeter_dma),
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 455) &rm->dma_buf_p, GFP_KERNEL);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 456) if (rm->dma_buf_v == NULL) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 457) printk(KERN_ERR
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 458) "rackmeter: failed to allocate dma buffer !\n");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 459) rc = -ENOMEM;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 460) goto bail_free_samples;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 461) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 462) #if 0
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 463) rm->i2s_regs = ioremap(macio_resource_start(mdev, 0), 0x1000);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 464) #else
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 465) rm->i2s_regs = ioremap(ri2s.start, 0x1000);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 466) #endif
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 467) if (rm->i2s_regs == NULL) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 468) printk(KERN_ERR
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 469) "rackmeter: failed to map i2s registers !\n");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 470) rc = -ENXIO;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 471) goto bail_free_dma;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 472) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 473) #if 0
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 474) rm->dma_regs = ioremap(macio_resource_start(mdev, 1), 0x100);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 475) #else
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 476) rm->dma_regs = ioremap(rdma.start, 0x100);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 477) #endif
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 478) if (rm->dma_regs == NULL) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 479) printk(KERN_ERR
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 480) "rackmeter: failed to map dma registers !\n");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 481) rc = -ENXIO;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 482) goto bail_unmap_i2s;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 483) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 484)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 485) rc = rackmeter_setup(rm);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 486) if (rc) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 487) printk(KERN_ERR
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 488) "rackmeter: failed to initialize !\n");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 489) rc = -ENXIO;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 490) goto bail_unmap_dma;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 491) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 492)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 493) rc = request_irq(rm->irq, rackmeter_irq, 0, "rackmeter", rm);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 494) if (rc != 0) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 495) printk(KERN_ERR
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 496) "rackmeter: failed to request interrupt !\n");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 497) goto bail_stop_dma;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 498) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 499) of_node_put(np);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 500) return 0;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 501)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 502) bail_stop_dma:
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 503) DBDMA_DO_RESET(rm->dma_regs);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 504) bail_unmap_dma:
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 505) iounmap(rm->dma_regs);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 506) bail_unmap_i2s:
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 507) iounmap(rm->i2s_regs);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 508) bail_free_dma:
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 509) dma_free_coherent(&macio_get_pci_dev(mdev)->dev,
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 510) sizeof(struct rackmeter_dma),
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 511) rm->dma_buf_v, rm->dma_buf_p);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 512) bail_free_samples:
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 513) free_page((unsigned long)rm->ubuf);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 514) bail_release:
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 515) #if 0
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 516) macio_release_resources(mdev);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 517) #endif
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 518) bail_free:
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 519) kfree(rm);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 520) bail:
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 521) of_node_put(i2s);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 522) of_node_put(np);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 523) dev_set_drvdata(&mdev->ofdev.dev, NULL);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 524) return rc;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 525) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 526)
1da42fb6bf6fc (Greg Kroah-Hartman 2012-12-21 15:03:50 -0800 527) static int rackmeter_remove(struct macio_dev* mdev)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 528) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 529) struct rackmeter *rm = dev_get_drvdata(&mdev->ofdev.dev);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 530)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 531) /* Stop CPU sniffer timer & work queues */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 532) rackmeter_stop_cpu_sniffer(rm);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 533)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 534) /* Clear reference to private data */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 535) dev_set_drvdata(&mdev->ofdev.dev, NULL);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 536)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 537) /* Stop/reset dbdma */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 538) DBDMA_DO_RESET(rm->dma_regs);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 539)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 540) /* Release the IRQ */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 541) free_irq(rm->irq, rm);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 542)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 543) /* Unmap registers */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 544) iounmap(rm->dma_regs);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 545) iounmap(rm->i2s_regs);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 546)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 547) /* Free DMA */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 548) dma_free_coherent(&macio_get_pci_dev(mdev)->dev,
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 549) sizeof(struct rackmeter_dma),
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 550) rm->dma_buf_v, rm->dma_buf_p);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 551)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 552) /* Free samples */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 553) free_page((unsigned long)rm->ubuf);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 554)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 555) #if 0
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 556) /* Release resources */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 557) macio_release_resources(mdev);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 558) #endif
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 559)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 560) /* Get rid of me */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 561) kfree(rm);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 562)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 563) return 0;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 564) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 565)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 566) static int rackmeter_shutdown(struct macio_dev* mdev)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 567) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 568) struct rackmeter *rm = dev_get_drvdata(&mdev->ofdev.dev);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 569)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 570) if (rm == NULL)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 571) return -ENODEV;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 572)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 573) /* Stop CPU sniffer timer & work queues */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 574) rackmeter_stop_cpu_sniffer(rm);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 575)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 576) /* Stop/reset dbdma */
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 577) DBDMA_DO_RESET(rm->dma_regs);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 578)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 579) return 0;
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 580) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 581)
516fa8d0e19d8 (Arvind Yadav 2017-06-19 11:14:25 +0530 582) static const struct of_device_id rackmeter_match[] = {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 583) { .name = "i2s" },
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 584) { }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 585) };
6735b2e985b78 (Luis de Bethencourt 2015-10-20 16:13:53 +0100 586) MODULE_DEVICE_TABLE(of, rackmeter_match);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 587)
31421a6f6ea88 (Al Viro 2008-11-22 17:35:24 +0000 588) static struct macio_driver rackmeter_driver = {
c2cdf6aba0dfc (Benjamin Herrenschmidt 2010-06-02 17:09:18 +1000 589) .driver = {
c2cdf6aba0dfc (Benjamin Herrenschmidt 2010-06-02 17:09:18 +1000 590) .name = "rackmeter",
c2cdf6aba0dfc (Benjamin Herrenschmidt 2010-06-02 17:09:18 +1000 591) .owner = THIS_MODULE,
c2cdf6aba0dfc (Benjamin Herrenschmidt 2010-06-02 17:09:18 +1000 592) .of_match_table = rackmeter_match,
c2cdf6aba0dfc (Benjamin Herrenschmidt 2010-06-02 17:09:18 +1000 593) },
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 594) .probe = rackmeter_probe,
1da42fb6bf6fc (Greg Kroah-Hartman 2012-12-21 15:03:50 -0800 595) .remove = rackmeter_remove,
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 596) .shutdown = rackmeter_shutdown,
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 597) };
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 598)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 599)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 600) static int __init rackmeter_init(void)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 601) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 602) pr_debug("rackmeter_init()\n");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 603)
31421a6f6ea88 (Al Viro 2008-11-22 17:35:24 +0000 604) return macio_register_driver(&rackmeter_driver);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 605) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 606)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 607) static void __exit rackmeter_exit(void)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 608) {
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 609) pr_debug("rackmeter_exit()\n");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 610)
31421a6f6ea88 (Al Viro 2008-11-22 17:35:24 +0000 611) macio_unregister_driver(&rackmeter_driver);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 612) }
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 613)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 614) module_init(rackmeter_init);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 615) module_exit(rackmeter_exit);
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 616)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 617)
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 618) MODULE_LICENSE("GPL");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 619) MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>");
3e00a5aec3d6a (Benjamin Herrenschmidt 2006-11-16 14:03:33 +1100 620) MODULE_DESCRIPTION("RackMeter: Support vu-meter on XServe front panel");
VisionFive2 Linux kernel
StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)
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