d2912cb15bdda (Thomas Gleixner 2019-06-04 10:11:33 +0200 1) // SPDX-License-Identifier: GPL-2.0-only
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 2) /*
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 3) * TI da8xx master peripheral priority driver
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 4) *
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 5) * Copyright (C) 2016 BayLibre SAS
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 6) *
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 7) * Author:
430d7dd448f48 (Bartosz Golaszewski 2016-12-19 10:58:11 +0100 8) * Bartosz Golaszewski <bgolaszewski@baylibre.com>
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 9) */
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 10)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 11) #include <linux/module.h>
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 12) #include <linux/of.h>
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 13) #include <linux/platform_device.h>
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 14) #include <linux/io.h>
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 15) #include <linux/regmap.h>
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 16)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 17) /*
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 18) * REVISIT: Linux doesn't have a good framework for the kind of performance
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 19) * knobs this driver controls. We can't use device tree properties as it deals
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 20) * with hardware configuration rather than description. We also don't want to
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 21) * commit to maintaining some random sysfs attributes.
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 22) *
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 23) * For now we just hardcode the register values for the boards that need
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 24) * some changes (as is the case for the LCD controller on da850-lcdk - the
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 25) * first board we support here). When linux gets an appropriate framework,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 26) * we'll easily convert the driver to it.
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 27) */
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 28)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 29) #define DA8XX_MSTPRI0_OFFSET 0
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 30) #define DA8XX_MSTPRI1_OFFSET 4
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 31) #define DA8XX_MSTPRI2_OFFSET 8
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 32)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 33) enum {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 34) DA8XX_MSTPRI_ARM_I = 0,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 35) DA8XX_MSTPRI_ARM_D,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 36) DA8XX_MSTPRI_UPP,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 37) DA8XX_MSTPRI_SATA,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 38) DA8XX_MSTPRI_PRU0,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 39) DA8XX_MSTPRI_PRU1,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 40) DA8XX_MSTPRI_EDMA30TC0,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 41) DA8XX_MSTPRI_EDMA30TC1,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 42) DA8XX_MSTPRI_EDMA31TC0,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 43) DA8XX_MSTPRI_VPIF_DMA_0,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 44) DA8XX_MSTPRI_VPIF_DMA_1,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 45) DA8XX_MSTPRI_EMAC,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 46) DA8XX_MSTPRI_USB0CFG,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 47) DA8XX_MSTPRI_USB0CDMA,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 48) DA8XX_MSTPRI_UHPI,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 49) DA8XX_MSTPRI_USB1,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 50) DA8XX_MSTPRI_LCDC,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 51) };
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 52)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 53) struct da8xx_mstpri_descr {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 54) int reg;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 55) int shift;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 56) int mask;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 57) };
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 58)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 59) static const struct da8xx_mstpri_descr da8xx_mstpri_priority_list[] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 60) [DA8XX_MSTPRI_ARM_I] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 61) .reg = DA8XX_MSTPRI0_OFFSET,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 62) .shift = 0,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 63) .mask = 0x0000000f,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 64) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 65) [DA8XX_MSTPRI_ARM_D] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 66) .reg = DA8XX_MSTPRI0_OFFSET,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 67) .shift = 4,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 68) .mask = 0x000000f0,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 69) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 70) [DA8XX_MSTPRI_UPP] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 71) .reg = DA8XX_MSTPRI0_OFFSET,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 72) .shift = 16,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 73) .mask = 0x000f0000,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 74) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 75) [DA8XX_MSTPRI_SATA] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 76) .reg = DA8XX_MSTPRI0_OFFSET,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 77) .shift = 20,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 78) .mask = 0x00f00000,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 79) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 80) [DA8XX_MSTPRI_PRU0] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 81) .reg = DA8XX_MSTPRI1_OFFSET,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 82) .shift = 0,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 83) .mask = 0x0000000f,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 84) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 85) [DA8XX_MSTPRI_PRU1] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 86) .reg = DA8XX_MSTPRI1_OFFSET,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 87) .shift = 4,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 88) .mask = 0x000000f0,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 89) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 90) [DA8XX_MSTPRI_EDMA30TC0] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 91) .reg = DA8XX_MSTPRI1_OFFSET,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 92) .shift = 8,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 93) .mask = 0x00000f00,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 94) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 95) [DA8XX_MSTPRI_EDMA30TC1] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 96) .reg = DA8XX_MSTPRI1_OFFSET,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 97) .shift = 12,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 98) .mask = 0x0000f000,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 99) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 100) [DA8XX_MSTPRI_EDMA31TC0] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 101) .reg = DA8XX_MSTPRI1_OFFSET,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 102) .shift = 16,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 103) .mask = 0x000f0000,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 104) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 105) [DA8XX_MSTPRI_VPIF_DMA_0] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 106) .reg = DA8XX_MSTPRI1_OFFSET,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 107) .shift = 24,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 108) .mask = 0x0f000000,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 109) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 110) [DA8XX_MSTPRI_VPIF_DMA_1] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 111) .reg = DA8XX_MSTPRI1_OFFSET,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 112) .shift = 28,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 113) .mask = 0xf0000000,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 114) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 115) [DA8XX_MSTPRI_EMAC] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 116) .reg = DA8XX_MSTPRI2_OFFSET,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 117) .shift = 0,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 118) .mask = 0x0000000f,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 119) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 120) [DA8XX_MSTPRI_USB0CFG] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 121) .reg = DA8XX_MSTPRI2_OFFSET,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 122) .shift = 8,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 123) .mask = 0x00000f00,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 124) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 125) [DA8XX_MSTPRI_USB0CDMA] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 126) .reg = DA8XX_MSTPRI2_OFFSET,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 127) .shift = 12,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 128) .mask = 0x0000f000,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 129) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 130) [DA8XX_MSTPRI_UHPI] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 131) .reg = DA8XX_MSTPRI2_OFFSET,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 132) .shift = 20,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 133) .mask = 0x00f00000,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 134) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 135) [DA8XX_MSTPRI_USB1] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 136) .reg = DA8XX_MSTPRI2_OFFSET,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 137) .shift = 24,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 138) .mask = 0x0f000000,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 139) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 140) [DA8XX_MSTPRI_LCDC] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 141) .reg = DA8XX_MSTPRI2_OFFSET,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 142) .shift = 28,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 143) .mask = 0xf0000000,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 144) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 145) };
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 146)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 147) struct da8xx_mstpri_priority {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 148) int which;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 149) u32 val;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 150) };
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 151)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 152) struct da8xx_mstpri_board_priorities {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 153) const char *board;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 154) const struct da8xx_mstpri_priority *priorities;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 155) size_t numprio;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 156) };
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 157)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 158) /*
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 159) * Default memory settings of da850 do not meet the throughput/latency
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 160) * requirements of tilcdc. This results in the image displayed being
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 161) * incorrect and the following warning being displayed by the LCDC
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 162) * drm driver:
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 163) *
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 164) * tilcdc da8xx_lcdc.0: tilcdc_crtc_irq(0x00000020): FIFO underfow
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 165) */
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 166) static const struct da8xx_mstpri_priority da850_lcdk_priorities[] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 167) {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 168) .which = DA8XX_MSTPRI_LCDC,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 169) .val = 0,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 170) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 171) {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 172) .which = DA8XX_MSTPRI_EDMA30TC1,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 173) .val = 0,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 174) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 175) {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 176) .which = DA8XX_MSTPRI_EDMA30TC0,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 177) .val = 1,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 178) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 179) };
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 180)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 181) static const struct da8xx_mstpri_board_priorities da8xx_mstpri_board_confs[] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 182) {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 183) .board = "ti,da850-lcdk",
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 184) .priorities = da850_lcdk_priorities,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 185) .numprio = ARRAY_SIZE(da850_lcdk_priorities),
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 186) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 187) };
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 188)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 189) static const struct da8xx_mstpri_board_priorities *
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 190) da8xx_mstpri_get_board_prio(void)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 191) {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 192) const struct da8xx_mstpri_board_priorities *board_prio;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 193) int i;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 194)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 195) for (i = 0; i < ARRAY_SIZE(da8xx_mstpri_board_confs); i++) {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 196) board_prio = &da8xx_mstpri_board_confs[i];
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 197)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 198) if (of_machine_is_compatible(board_prio->board))
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 199) return board_prio;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 200) }
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 201)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 202) return NULL;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 203) }
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 204)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 205) static int da8xx_mstpri_probe(struct platform_device *pdev)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 206) {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 207) const struct da8xx_mstpri_board_priorities *prio_list;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 208) const struct da8xx_mstpri_descr *prio_descr;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 209) const struct da8xx_mstpri_priority *prio;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 210) struct device *dev = &pdev->dev;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 211) struct resource *res;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 212) void __iomem *mstpri;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 213) u32 reg;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 214) int i;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 215)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 216) res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 217) mstpri = devm_ioremap_resource(dev, res);
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 218) if (IS_ERR(mstpri)) {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 219) dev_err(dev, "unable to map MSTPRI registers\n");
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 220) return PTR_ERR(mstpri);
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 221) }
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 222)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 223) prio_list = da8xx_mstpri_get_board_prio();
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 224) if (!prio_list) {
48c28337380ac (Bartosz Golaszewski 2016-11-23 14:39:59 +0100 225) dev_err(dev, "no master priorities defined for this board\n");
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 226) return -EINVAL;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 227) }
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 228)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 229) for (i = 0; i < prio_list->numprio; i++) {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 230) prio = &prio_list->priorities[i];
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 231) prio_descr = &da8xx_mstpri_priority_list[prio->which];
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 232)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 233) if (prio_descr->reg + sizeof(u32) > resource_size(res)) {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 234) dev_warn(dev, "register offset out of range\n");
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 235) continue;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 236) }
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 237)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 238) reg = readl(mstpri + prio_descr->reg);
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 239) reg &= ~prio_descr->mask;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 240) reg |= prio->val << prio_descr->shift;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 241)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 242) writel(reg, mstpri + prio_descr->reg);
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 243) }
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 244)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 245) return 0;
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 246) }
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 247)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 248) static const struct of_device_id da8xx_mstpri_of_match[] = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 249) { .compatible = "ti,da850-mstpri", },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 250) { },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 251) };
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 252)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 253) static struct platform_driver da8xx_mstpri_driver = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 254) .probe = da8xx_mstpri_probe,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 255) .driver = {
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 256) .name = "da8xx-mstpri",
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 257) .of_match_table = da8xx_mstpri_of_match,
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 258) },
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 259) };
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 260) module_platform_driver(da8xx_mstpri_driver);
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 261)
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 262) MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 263) MODULE_DESCRIPTION("TI da8xx master peripheral priority driver");
8e7223fc8626d (Bartosz Golaszewski 2016-10-31 15:45:35 +0100 264) MODULE_LICENSE("GPL v2");
VisionFive2 Linux kernel
StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)
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