+++ /dev/null
-/*
- * Renesas SH-mobile MIPI DSI support
- *
- * Copyright (C) 2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
- *
- * This is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- */
-
-#include <linux/bitmap.h>
-#include <linux/clk.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/platform_device.h>
-#include <linux/pm_runtime.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/module.h>
-
-#include <video/mipi_display.h>
-#include <video/sh_mipi_dsi.h>
-#include <video/sh_mobile_lcdc.h>
-
-#include "sh_mobile_lcdcfb.h"
-
-#define SYSCTRL 0x0000
-#define SYSCONF 0x0004
-#define TIMSET 0x0008
-#define RESREQSET0 0x0018
-#define RESREQSET1 0x001c
-#define HSTTOVSET 0x0020
-#define LPRTOVSET 0x0024
-#define TATOVSET 0x0028
-#define PRTOVSET 0x002c
-#define DSICTRL 0x0030
-#define DSIINTE 0x0060
-#define PHYCTRL 0x0070
-
-/* relative to linkbase */
-#define DTCTR 0x0000
-#define VMCTR1 0x0020
-#define VMCTR2 0x0024
-#define VMLEN1 0x0028
-#define VMLEN2 0x002c
-#define CMTSRTREQ 0x0070
-#define CMTSRTCTR 0x00d0
-
-/* E.g., sh7372 has 2 MIPI-DSIs - one for each LCDC */
-#define MAX_SH_MIPI_DSI 2
-
-struct sh_mipi {
- struct sh_mobile_lcdc_entity entity;
-
- void __iomem *base;
- void __iomem *linkbase;
- struct clk *dsit_clk;
- struct platform_device *pdev;
-};
-
-#define to_sh_mipi(e) container_of(e, struct sh_mipi, entity)
-
-static struct sh_mipi *mipi_dsi[MAX_SH_MIPI_DSI];
-
-/* Protect the above array */
-static DEFINE_MUTEX(array_lock);
-
-static struct sh_mipi *sh_mipi_by_handle(int handle)
-{
- if (handle >= ARRAY_SIZE(mipi_dsi) || handle < 0)
- return NULL;
-
- return mipi_dsi[handle];
-}
-
-static int sh_mipi_send_short(struct sh_mipi *mipi, u8 dsi_cmd,
- u8 cmd, u8 param)
-{
- u32 data = (dsi_cmd << 24) | (cmd << 16) | (param << 8);
- int cnt = 100;
-
- /* transmit a short packet to LCD panel */
- iowrite32(1 | data, mipi->linkbase + CMTSRTCTR);
- iowrite32(1, mipi->linkbase + CMTSRTREQ);
-
- while ((ioread32(mipi->linkbase + CMTSRTREQ) & 1) && --cnt)
- udelay(1);
-
- return cnt ? 0 : -ETIMEDOUT;
-}
-
-#define LCD_CHAN2MIPI(c) ((c) < LCDC_CHAN_MAINLCD || (c) > LCDC_CHAN_SUBLCD ? \
- -EINVAL : (c) - 1)
-
-static int sh_mipi_dcs(int handle, u8 cmd)
-{
- struct sh_mipi *mipi = sh_mipi_by_handle(LCD_CHAN2MIPI(handle));
- if (!mipi)
- return -ENODEV;
- return sh_mipi_send_short(mipi, MIPI_DSI_DCS_SHORT_WRITE, cmd, 0);
-}
-
-static int sh_mipi_dcs_param(int handle, u8 cmd, u8 param)
-{
- struct sh_mipi *mipi = sh_mipi_by_handle(LCD_CHAN2MIPI(handle));
- if (!mipi)
- return -ENODEV;
- return sh_mipi_send_short(mipi, MIPI_DSI_DCS_SHORT_WRITE_PARAM, cmd,
- param);
-}
-
-static void sh_mipi_dsi_enable(struct sh_mipi *mipi, bool enable)
-{
- /*
- * enable LCDC data tx, transition to LPS after completion of each HS
- * packet
- */
- iowrite32(0x00000002 | enable, mipi->linkbase + DTCTR);
-}
-
-static void sh_mipi_shutdown(struct platform_device *pdev)
-{
- struct sh_mipi *mipi = to_sh_mipi(platform_get_drvdata(pdev));
-
- sh_mipi_dsi_enable(mipi, false);
-}
-
-static int sh_mipi_setup(struct sh_mipi *mipi, const struct fb_videomode *mode)
-{
- void __iomem *base = mipi->base;
- struct sh_mipi_dsi_info *pdata = mipi->pdev->dev.platform_data;
- u32 pctype, datatype, pixfmt, linelength, vmctr2;
- u32 tmp, top, bottom, delay, div;
- int bpp;
-
- /*
- * Select data format. MIPI DSI is not hot-pluggable, so, we just use
- * the default videomode. If this ever becomes a problem, We'll have to
- * move this to mipi_display_on() above and use info->var.xres
- */
- switch (pdata->data_format) {
- case MIPI_RGB888:
- pctype = 0;
- datatype = MIPI_DSI_PACKED_PIXEL_STREAM_24;
- pixfmt = MIPI_DCS_PIXEL_FMT_24BIT;
- linelength = mode->xres * 3;
- break;
- case MIPI_RGB565:
- pctype = 1;
- datatype = MIPI_DSI_PACKED_PIXEL_STREAM_16;
- pixfmt = MIPI_DCS_PIXEL_FMT_16BIT;
- linelength = mode->xres * 2;
- break;
- case MIPI_RGB666_LP:
- pctype = 2;
- datatype = MIPI_DSI_PIXEL_STREAM_3BYTE_18;
- pixfmt = MIPI_DCS_PIXEL_FMT_24BIT;
- linelength = mode->xres * 3;
- break;
- case MIPI_RGB666:
- pctype = 3;
- datatype = MIPI_DSI_PACKED_PIXEL_STREAM_18;
- pixfmt = MIPI_DCS_PIXEL_FMT_18BIT;
- linelength = (mode->xres * 18 + 7) / 8;
- break;
- case MIPI_BGR888:
- pctype = 8;
- datatype = MIPI_DSI_PACKED_PIXEL_STREAM_24;
- pixfmt = MIPI_DCS_PIXEL_FMT_24BIT;
- linelength = mode->xres * 3;
- break;
- case MIPI_BGR565:
- pctype = 9;
- datatype = MIPI_DSI_PACKED_PIXEL_STREAM_16;
- pixfmt = MIPI_DCS_PIXEL_FMT_16BIT;
- linelength = mode->xres * 2;
- break;
- case MIPI_BGR666_LP:
- pctype = 0xa;
- datatype = MIPI_DSI_PIXEL_STREAM_3BYTE_18;
- pixfmt = MIPI_DCS_PIXEL_FMT_24BIT;
- linelength = mode->xres * 3;
- break;
- case MIPI_BGR666:
- pctype = 0xb;
- datatype = MIPI_DSI_PACKED_PIXEL_STREAM_18;
- pixfmt = MIPI_DCS_PIXEL_FMT_18BIT;
- linelength = (mode->xres * 18 + 7) / 8;
- break;
- case MIPI_YUYV:
- pctype = 4;
- datatype = MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR16;
- pixfmt = MIPI_DCS_PIXEL_FMT_16BIT;
- linelength = mode->xres * 2;
- break;
- case MIPI_UYVY:
- pctype = 5;
- datatype = MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR16;
- pixfmt = MIPI_DCS_PIXEL_FMT_16BIT;
- linelength = mode->xres * 2;
- break;
- case MIPI_YUV420_L:
- pctype = 6;
- datatype = MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR12;
- pixfmt = MIPI_DCS_PIXEL_FMT_12BIT;
- linelength = (mode->xres * 12 + 7) / 8;
- break;
- case MIPI_YUV420:
- pctype = 7;
- datatype = MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR12;
- pixfmt = MIPI_DCS_PIXEL_FMT_12BIT;
- /* Length of U/V line */
- linelength = (mode->xres + 1) / 2;
- break;
- default:
- return -EINVAL;
- }
-
- if (!pdata->lane)
- return -EINVAL;
-
- /* reset DSI link */
- iowrite32(0x00000001, base + SYSCTRL);
- /* Hold reset for 100 cycles of the slowest of bus, HS byte and LP clock */
- udelay(50);
- iowrite32(0x00000000, base + SYSCTRL);
-
- /* setup DSI link */
-
- /*
- * T_wakeup = 0x7000
- * T_hs-trail = 3
- * T_hs-prepare = 3
- * T_clk-trail = 3
- * T_clk-prepare = 2
- */
- iowrite32(0x70003332, base + TIMSET);
- /* no responses requested */
- iowrite32(0x00000000, base + RESREQSET0);
- /* request response to packets of type 0x28 */
- iowrite32(0x00000100, base + RESREQSET1);
- /* High-speed transmission timeout, default 0xffffffff */
- iowrite32(0x0fffffff, base + HSTTOVSET);
- /* LP reception timeout, default 0xffffffff */
- iowrite32(0x0fffffff, base + LPRTOVSET);
- /* Turn-around timeout, default 0xffffffff */
- iowrite32(0x0fffffff, base + TATOVSET);
- /* Peripheral reset timeout, default 0xffffffff */
- iowrite32(0x0fffffff, base + PRTOVSET);
- /* Interrupts not used, disable all */
- iowrite32(0, base + DSIINTE);
- /* DSI-Tx bias on */
- iowrite32(0x00000001, base + PHYCTRL);
- udelay(200);
- /* Deassert resets, power on */
- iowrite32(0x03070001 | pdata->phyctrl, base + PHYCTRL);
-
- /*
- * Default = ULPS enable |
- * Contention detection enabled |
- * EoT packet transmission enable |
- * CRC check enable |
- * ECC check enable
- */
- bitmap_fill((unsigned long *)&tmp, pdata->lane);
- tmp |= 0x00003700;
- iowrite32(tmp, base + SYSCONF);
-
- /* setup l-bridge */
-
- /*
- * Enable transmission of all packets,
- * transmit LPS after each HS packet completion
- */
- iowrite32(0x00000006, mipi->linkbase + DTCTR);
- /* VSYNC width = 2 (<< 17) */
- iowrite32((mode->vsync_len << pdata->vsynw_offset) |
- (pdata->clksrc << 16) | (pctype << 12) | datatype,
- mipi->linkbase + VMCTR1);
-
- /*
- * Non-burst mode with sync pulses: VSE and HSE are output,
- * HSA period allowed, no commands in LP
- */
- vmctr2 = 0;
- if (pdata->flags & SH_MIPI_DSI_VSEE)
- vmctr2 |= 1 << 23;
- if (pdata->flags & SH_MIPI_DSI_HSEE)
- vmctr2 |= 1 << 22;
- if (pdata->flags & SH_MIPI_DSI_HSAE)
- vmctr2 |= 1 << 21;
- if (pdata->flags & SH_MIPI_DSI_BL2E)
- vmctr2 |= 1 << 17;
- if (pdata->flags & SH_MIPI_DSI_HSABM)
- vmctr2 |= 1 << 5;
- if (pdata->flags & SH_MIPI_DSI_HBPBM)
- vmctr2 |= 1 << 4;
- if (pdata->flags & SH_MIPI_DSI_HFPBM)
- vmctr2 |= 1 << 3;
- iowrite32(vmctr2, mipi->linkbase + VMCTR2);
-
- /*
- * VMLEN1 = RGBLEN | HSALEN
- *
- * see
- * Video mode - Blanking Packet setting
- */
- top = linelength << 16; /* RGBLEN */
- bottom = 0x00000001;
- if (pdata->flags & SH_MIPI_DSI_HSABM) /* HSALEN */
- bottom = (pdata->lane * mode->hsync_len) - 10;
- iowrite32(top | bottom , mipi->linkbase + VMLEN1);
-
- /*
- * VMLEN2 = HBPLEN | HFPLEN
- *
- * see
- * Video mode - Blanking Packet setting
- */
- top = 0x00010000;
- bottom = 0x00000001;
- delay = 0;
-
- div = 1; /* HSbyteCLK is calculation base
- * HS4divCLK = HSbyteCLK/2
- * HS6divCLK is not supported for now */
- if (pdata->flags & SH_MIPI_DSI_HS4divCLK)
- div = 2;
-
- if (pdata->flags & SH_MIPI_DSI_HFPBM) { /* HBPLEN */
- top = mode->hsync_len + mode->left_margin;
- top = ((pdata->lane * top / div) - 10) << 16;
- }
- if (pdata->flags & SH_MIPI_DSI_HBPBM) { /* HFPLEN */
- bottom = mode->right_margin;
- bottom = (pdata->lane * bottom / div) - 12;
- }
-
- bpp = linelength / mode->xres; /* byte / pixel */
- if ((pdata->lane / div) > bpp) {
- tmp = mode->xres / bpp; /* output cycle */
- tmp = mode->xres - tmp; /* (input - output) cycle */
- delay = (pdata->lane * tmp);
- }
-
- iowrite32(top | (bottom + delay) , mipi->linkbase + VMLEN2);
-
- msleep(5);
-
- /* setup LCD panel */
-
- /* cf. drivers/video/omap/lcd_mipid.c */
- sh_mipi_dcs(pdata->channel, MIPI_DCS_EXIT_SLEEP_MODE);
- msleep(120);
- /*
- * [7] - Page Address Mode
- * [6] - Column Address Mode
- * [5] - Page / Column Address Mode
- * [4] - Display Device Line Refresh Order
- * [3] - RGB/BGR Order
- * [2] - Display Data Latch Data Order
- * [1] - Flip Horizontal
- * [0] - Flip Vertical
- */
- sh_mipi_dcs_param(pdata->channel, MIPI_DCS_SET_ADDRESS_MODE, 0x00);
- /* cf. set_data_lines() */
- sh_mipi_dcs_param(pdata->channel, MIPI_DCS_SET_PIXEL_FORMAT,
- pixfmt << 4);
- sh_mipi_dcs(pdata->channel, MIPI_DCS_SET_DISPLAY_ON);
-
- /* Enable timeout counters */
- iowrite32(0x00000f00, base + DSICTRL);
-
- return 0;
-}
-
-static int mipi_display_on(struct sh_mobile_lcdc_entity *entity)
-{
- struct sh_mipi *mipi = to_sh_mipi(entity);
- struct sh_mipi_dsi_info *pdata = mipi->pdev->dev.platform_data;
- int ret;
-
- pm_runtime_get_sync(&mipi->pdev->dev);
-
- ret = pdata->set_dot_clock(mipi->pdev, mipi->base, 1);
- if (ret < 0)
- goto mipi_display_on_fail1;
-
- ret = sh_mipi_setup(mipi, &entity->def_mode);
- if (ret < 0)
- goto mipi_display_on_fail2;
-
- sh_mipi_dsi_enable(mipi, true);
-
- return SH_MOBILE_LCDC_DISPLAY_CONNECTED;
-
-mipi_display_on_fail1:
- pm_runtime_put_sync(&mipi->pdev->dev);
-mipi_display_on_fail2:
- pdata->set_dot_clock(mipi->pdev, mipi->base, 0);
-
- return ret;
-}
-
-static void mipi_display_off(struct sh_mobile_lcdc_entity *entity)
-{
- struct sh_mipi *mipi = to_sh_mipi(entity);
- struct sh_mipi_dsi_info *pdata = mipi->pdev->dev.platform_data;
-
- sh_mipi_dsi_enable(mipi, false);
-
- pdata->set_dot_clock(mipi->pdev, mipi->base, 0);
-
- pm_runtime_put_sync(&mipi->pdev->dev);
-}
-
-static const struct sh_mobile_lcdc_entity_ops mipi_ops = {
- .display_on = mipi_display_on,
- .display_off = mipi_display_off,
-};
-
-static int __init sh_mipi_probe(struct platform_device *pdev)
-{
- struct sh_mipi *mipi;
- struct sh_mipi_dsi_info *pdata = pdev->dev.platform_data;
- struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- struct resource *res2 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- unsigned long rate, f_current;
- int idx = pdev->id, ret;
-
- if (!res || !res2 || idx >= ARRAY_SIZE(mipi_dsi) || !pdata)
- return -ENODEV;
-
- if (!pdata->set_dot_clock)
- return -EINVAL;
-
- mutex_lock(&array_lock);
- if (idx < 0)
- for (idx = 0; idx < ARRAY_SIZE(mipi_dsi) && mipi_dsi[idx]; idx++)
- ;
-
- if (idx == ARRAY_SIZE(mipi_dsi)) {
- ret = -EBUSY;
- goto efindslot;
- }
-
- mipi = kzalloc(sizeof(*mipi), GFP_KERNEL);
- if (!mipi) {
- ret = -ENOMEM;
- goto ealloc;
- }
-
- mipi->entity.owner = THIS_MODULE;
- mipi->entity.ops = &mipi_ops;
-
- if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
- dev_err(&pdev->dev, "MIPI register region already claimed\n");
- ret = -EBUSY;
- goto ereqreg;
- }
-
- mipi->base = ioremap(res->start, resource_size(res));
- if (!mipi->base) {
- ret = -ENOMEM;
- goto emap;
- }
-
- if (!request_mem_region(res2->start, resource_size(res2), pdev->name)) {
- dev_err(&pdev->dev, "MIPI register region 2 already claimed\n");
- ret = -EBUSY;
- goto ereqreg2;
- }
-
- mipi->linkbase = ioremap(res2->start, resource_size(res2));
- if (!mipi->linkbase) {
- ret = -ENOMEM;
- goto emap2;
- }
-
- mipi->pdev = pdev;
-
- mipi->dsit_clk = clk_get(&pdev->dev, "dsit_clk");
- if (IS_ERR(mipi->dsit_clk)) {
- ret = PTR_ERR(mipi->dsit_clk);
- goto eclktget;
- }
-
- f_current = clk_get_rate(mipi->dsit_clk);
- /* 80MHz required by the datasheet */
- rate = clk_round_rate(mipi->dsit_clk, 80000000);
- if (rate > 0 && rate != f_current)
- ret = clk_set_rate(mipi->dsit_clk, rate);
- else
- ret = rate;
- if (ret < 0)
- goto esettrate;
-
- dev_dbg(&pdev->dev, "DSI-T clk %lu -> %lu\n", f_current, rate);
-
- ret = clk_enable(mipi->dsit_clk);
- if (ret < 0)
- goto eclkton;
-
- mipi_dsi[idx] = mipi;
-
- pm_runtime_enable(&pdev->dev);
- pm_runtime_resume(&pdev->dev);
-
- mutex_unlock(&array_lock);
- platform_set_drvdata(pdev, &mipi->entity);
-
- return 0;
-
-eclkton:
-esettrate:
- clk_put(mipi->dsit_clk);
-eclktget:
- iounmap(mipi->linkbase);
-emap2:
- release_mem_region(res2->start, resource_size(res2));
-ereqreg2:
- iounmap(mipi->base);
-emap:
- release_mem_region(res->start, resource_size(res));
-ereqreg:
- kfree(mipi);
-ealloc:
-efindslot:
- mutex_unlock(&array_lock);
-
- return ret;
-}
-
-static int sh_mipi_remove(struct platform_device *pdev)
-{
- struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- struct resource *res2 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- struct sh_mipi *mipi = to_sh_mipi(platform_get_drvdata(pdev));
- int i, ret;
-
- mutex_lock(&array_lock);
-
- for (i = 0; i < ARRAY_SIZE(mipi_dsi) && mipi_dsi[i] != mipi; i++)
- ;
-
- if (i == ARRAY_SIZE(mipi_dsi)) {
- ret = -EINVAL;
- } else {
- ret = 0;
- mipi_dsi[i] = NULL;
- }
-
- mutex_unlock(&array_lock);
-
- if (ret < 0)
- return ret;
-
- pm_runtime_disable(&pdev->dev);
- clk_disable(mipi->dsit_clk);
- clk_put(mipi->dsit_clk);
-
- iounmap(mipi->linkbase);
- if (res2)
- release_mem_region(res2->start, resource_size(res2));
- iounmap(mipi->base);
- if (res)
- release_mem_region(res->start, resource_size(res));
- kfree(mipi);
-
- return 0;
-}
-
-static struct platform_driver sh_mipi_driver = {
- .remove = sh_mipi_remove,
- .shutdown = sh_mipi_shutdown,
- .driver = {
- .name = "sh-mipi-dsi",
- },
-};
-
-module_platform_driver_probe(sh_mipi_driver, sh_mipi_probe);
-
-MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
-MODULE_DESCRIPTION("SuperH / ARM-shmobile MIPI DSI driver");
-MODULE_LICENSE("GPL v2");
projects / cascardo / linux.git / commitdiff