2 * Renesas SH-mobile MIPI DSI support
4 * Copyright (C) 2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
6 * This is free software; you can redistribute it and/or modify
7 * it under the terms of version 2 of the GNU General Public License as
8 * published by the Free Software Foundation.
11 #include <linux/clk.h>
12 #include <linux/delay.h>
13 #include <linux/init.h>
15 #include <linux/platform_device.h>
16 #include <linux/slab.h>
17 #include <linux/string.h>
18 #include <linux/types.h>
20 #include <video/mipi_display.h>
21 #include <video/sh_mipi_dsi.h>
22 #include <video/sh_mobile_lcdc.h>
24 #define CMTSRTCTR 0x80d0
25 #define CMTSRTREQ 0x8070
27 #define DSIINTE 0x0060
29 /* E.g., sh7372 has 2 MIPI-DSIs - one for each LCDC */
30 #define MAX_SH_MIPI_DSI 2
38 static struct sh_mipi *mipi_dsi[MAX_SH_MIPI_DSI];
40 /* Protect the above array */
41 static DEFINE_MUTEX(array_lock);
43 static struct sh_mipi *sh_mipi_by_handle(int handle)
45 if (handle >= ARRAY_SIZE(mipi_dsi) || handle < 0)
48 return mipi_dsi[handle];
51 static int sh_mipi_send_short(struct sh_mipi *mipi, u8 dsi_cmd,
54 u32 data = (dsi_cmd << 24) | (cmd << 16) | (param << 8);
57 /* transmit a short packet to LCD panel */
58 iowrite32(1 | data, mipi->base + 0x80d0); /* CMTSRTCTR */
59 iowrite32(1, mipi->base + 0x8070); /* CMTSRTREQ */
61 while ((ioread32(mipi->base + 0x8070) & 1) && --cnt)
64 return cnt ? 0 : -ETIMEDOUT;
67 #define LCD_CHAN2MIPI(c) ((c) < LCDC_CHAN_MAINLCD || (c) > LCDC_CHAN_SUBLCD ? \
70 static int sh_mipi_dcs(int handle, u8 cmd)
72 struct sh_mipi *mipi = sh_mipi_by_handle(LCD_CHAN2MIPI(handle));
75 return sh_mipi_send_short(mipi, MIPI_DSI_DCS_SHORT_WRITE, cmd, 0);
78 static int sh_mipi_dcs_param(int handle, u8 cmd, u8 param)
80 struct sh_mipi *mipi = sh_mipi_by_handle(LCD_CHAN2MIPI(handle));
83 return sh_mipi_send_short(mipi, MIPI_DSI_DCS_SHORT_WRITE_PARAM, cmd,
87 static void sh_mipi_dsi_enable(struct sh_mipi *mipi, bool enable)
90 * enable LCDC data tx, transition to LPS after completion of each HS
93 iowrite32(0x00000002 | enable, mipi->base + 0x8000); /* DTCTR */
96 static void sh_mipi_shutdown(struct platform_device *pdev)
98 struct sh_mipi *mipi = platform_get_drvdata(pdev);
100 sh_mipi_dsi_enable(mipi, false);
103 static void mipi_display_on(void *arg, struct fb_info *info)
105 struct sh_mipi *mipi = arg;
107 sh_mipi_dsi_enable(mipi, true);
110 static void mipi_display_off(void *arg)
112 struct sh_mipi *mipi = arg;
114 sh_mipi_dsi_enable(mipi, false);
117 static int __init sh_mipi_setup(struct sh_mipi *mipi,
118 struct sh_mipi_dsi_info *pdata)
120 void __iomem *base = mipi->base;
121 struct sh_mobile_lcdc_chan_cfg *ch = pdata->lcd_chan;
122 u32 pctype, datatype, pixfmt;
126 /* Select data format */
127 switch (pdata->data_format) {
130 datatype = MIPI_DSI_PACKED_PIXEL_STREAM_24;
131 pixfmt = MIPI_DCS_PIXEL_FMT_24BIT;
132 linelength = ch->lcd_cfg.xres * 3;
137 datatype = MIPI_DSI_PACKED_PIXEL_STREAM_16;
138 pixfmt = MIPI_DCS_PIXEL_FMT_16BIT;
139 linelength = ch->lcd_cfg.xres * 2;
144 datatype = MIPI_DSI_PIXEL_STREAM_3BYTE_18;
145 pixfmt = MIPI_DCS_PIXEL_FMT_24BIT;
146 linelength = ch->lcd_cfg.xres * 3;
151 datatype = MIPI_DSI_PACKED_PIXEL_STREAM_18;
152 pixfmt = MIPI_DCS_PIXEL_FMT_18BIT;
153 linelength = (ch->lcd_cfg.xres * 18 + 7) / 8;
158 datatype = MIPI_DSI_PACKED_PIXEL_STREAM_24;
159 pixfmt = MIPI_DCS_PIXEL_FMT_24BIT;
160 linelength = ch->lcd_cfg.xres * 3;
165 datatype = MIPI_DSI_PACKED_PIXEL_STREAM_16;
166 pixfmt = MIPI_DCS_PIXEL_FMT_16BIT;
167 linelength = ch->lcd_cfg.xres * 2;
172 datatype = MIPI_DSI_PIXEL_STREAM_3BYTE_18;
173 pixfmt = MIPI_DCS_PIXEL_FMT_24BIT;
174 linelength = ch->lcd_cfg.xres * 3;
179 datatype = MIPI_DSI_PACKED_PIXEL_STREAM_18;
180 pixfmt = MIPI_DCS_PIXEL_FMT_18BIT;
181 linelength = (ch->lcd_cfg.xres * 18 + 7) / 8;
186 datatype = MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR16;
187 pixfmt = MIPI_DCS_PIXEL_FMT_16BIT;
188 linelength = ch->lcd_cfg.xres * 2;
193 datatype = MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR16;
194 pixfmt = MIPI_DCS_PIXEL_FMT_16BIT;
195 linelength = ch->lcd_cfg.xres * 2;
200 datatype = MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR12;
201 pixfmt = MIPI_DCS_PIXEL_FMT_12BIT;
202 linelength = (ch->lcd_cfg.xres * 12 + 7) / 8;
207 datatype = MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR12;
208 pixfmt = MIPI_DCS_PIXEL_FMT_12BIT;
209 /* Length of U/V line */
210 linelength = (ch->lcd_cfg.xres + 1) / 2;
217 if ((yuv && ch->interface_type != YUV422) ||
218 (!yuv && ch->interface_type != RGB24))
222 iowrite32(0x00000001, base); /* SYSCTRL */
223 /* Hold reset for 100 cycles of the slowest of bus, HS byte and LP clock */
225 iowrite32(0x00000000, base); /* SYSCTRL */
230 * Default = ULPS enable |
231 * Contention detection enabled |
232 * EoT packet transmission enable |
235 * additionally enable first two lanes
237 iowrite32(0x00003703, base + 0x04); /* SYSCONF */
245 iowrite32(0x70003332, base + 0x08); /* TIMSET */
246 /* no responses requested */
247 iowrite32(0x00000000, base + 0x18); /* RESREQSET0 */
248 /* request response to packets of type 0x28 */
249 iowrite32(0x00000100, base + 0x1c); /* RESREQSET1 */
250 /* High-speed transmission timeout, default 0xffffffff */
251 iowrite32(0x0fffffff, base + 0x20); /* HSTTOVSET */
252 /* LP reception timeout, default 0xffffffff */
253 iowrite32(0x0fffffff, base + 0x24); /* LPRTOVSET */
254 /* Turn-around timeout, default 0xffffffff */
255 iowrite32(0x0fffffff, base + 0x28); /* TATOVSET */
256 /* Peripheral reset timeout, default 0xffffffff */
257 iowrite32(0x0fffffff, base + 0x2c); /* PRTOVSET */
258 /* Enable timeout counters */
259 iowrite32(0x00000f00, base + 0x30); /* DSICTRL */
260 /* Interrupts not used, disable all */
261 iowrite32(0, base + DSIINTE);
263 iowrite32(0x00000001, base + 0x70); /* PHYCTRL */
265 /* Deassert resets, power on, set multiplier */
266 iowrite32(0x03070b01, base + 0x70); /* PHYCTRL */
271 * Enable transmission of all packets,
272 * transmit LPS after each HS packet completion
274 iowrite32(0x00000006, base + 0x8000); /* DTCTR */
275 /* VSYNC width = 2 (<< 17) */
276 iowrite32(0x00040000 | (pctype << 12) | datatype, base + 0x8020); /* VMCTR1 */
278 * Non-burst mode with sync pulses: VSE and HSE are output,
279 * HSA period allowed, no commands in LP
281 iowrite32(0x00e00000, base + 0x8024); /* VMCTR2 */
283 * 0x660 = 1632 bytes per line (RGB24, 544 pixels: see
284 * sh_mobile_lcdc_info.ch[0].lcd_cfg.xres), HSALEN = 1 - default
285 * (unused, since VMCTR2[HSABM] = 0)
287 iowrite32(1 | (linelength << 16), base + 0x8028); /* VMLEN1 */
291 /* setup LCD panel */
293 /* cf. drivers/video/omap/lcd_mipid.c */
294 sh_mipi_dcs(ch->chan, MIPI_DCS_EXIT_SLEEP_MODE);
297 * [7] - Page Address Mode
298 * [6] - Column Address Mode
299 * [5] - Page / Column Address Mode
300 * [4] - Display Device Line Refresh Order
301 * [3] - RGB/BGR Order
302 * [2] - Display Data Latch Data Order
303 * [1] - Flip Horizontal
304 * [0] - Flip Vertical
306 sh_mipi_dcs_param(ch->chan, MIPI_DCS_SET_ADDRESS_MODE, 0x00);
307 /* cf. set_data_lines() */
308 sh_mipi_dcs_param(ch->chan, MIPI_DCS_SET_PIXEL_FORMAT,
310 sh_mipi_dcs(ch->chan, MIPI_DCS_SET_DISPLAY_ON);
315 static int __init sh_mipi_probe(struct platform_device *pdev)
317 struct sh_mipi *mipi;
318 struct sh_mipi_dsi_info *pdata = pdev->dev.platform_data;
319 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
320 unsigned long rate, f_current;
321 int idx = pdev->id, ret;
322 char dsip_clk[] = "dsi.p_clk";
324 if (!res || idx >= ARRAY_SIZE(mipi_dsi) || !pdata)
327 mutex_lock(&array_lock);
329 for (idx = 0; idx < ARRAY_SIZE(mipi_dsi) && mipi_dsi[idx]; idx++)
332 if (idx == ARRAY_SIZE(mipi_dsi)) {
337 mipi = kzalloc(sizeof(*mipi), GFP_KERNEL);
343 if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
344 dev_err(&pdev->dev, "MIPI register region already claimed\n");
349 mipi->base = ioremap(res->start, resource_size(res));
355 mipi->dsit_clk = clk_get(&pdev->dev, "dsit_clk");
356 if (IS_ERR(mipi->dsit_clk)) {
357 ret = PTR_ERR(mipi->dsit_clk);
361 f_current = clk_get_rate(mipi->dsit_clk);
362 /* 80MHz required by the datasheet */
363 rate = clk_round_rate(mipi->dsit_clk, 80000000);
364 if (rate > 0 && rate != f_current)
365 ret = clk_set_rate(mipi->dsit_clk, rate);
371 dev_dbg(&pdev->dev, "DSI-T clk %lu -> %lu\n", f_current, rate);
373 sprintf(dsip_clk, "dsi%1.1dp_clk", idx);
374 mipi->dsip_clk = clk_get(&pdev->dev, dsip_clk);
375 if (IS_ERR(mipi->dsip_clk)) {
376 ret = PTR_ERR(mipi->dsip_clk);
380 f_current = clk_get_rate(mipi->dsip_clk);
381 /* Between 10 and 50MHz */
382 rate = clk_round_rate(mipi->dsip_clk, 24000000);
383 if (rate > 0 && rate != f_current)
384 ret = clk_set_rate(mipi->dsip_clk, rate);
390 dev_dbg(&pdev->dev, "DSI-P clk %lu -> %lu\n", f_current, rate);
394 ret = clk_enable(mipi->dsit_clk);
398 ret = clk_enable(mipi->dsip_clk);
402 mipi_dsi[idx] = mipi;
404 ret = sh_mipi_setup(mipi, pdata);
408 mutex_unlock(&array_lock);
409 platform_set_drvdata(pdev, mipi);
411 /* Set up LCDC callbacks */
412 pdata->lcd_chan->board_cfg.board_data = mipi;
413 pdata->lcd_chan->board_cfg.display_on = mipi_display_on;
414 pdata->lcd_chan->board_cfg.display_off = mipi_display_off;
419 mipi_dsi[idx] = NULL;
420 clk_disable(mipi->dsip_clk);
422 clk_disable(mipi->dsit_clk);
425 clk_put(mipi->dsip_clk);
428 clk_put(mipi->dsit_clk);
432 release_mem_region(res->start, resource_size(res));
437 mutex_unlock(&array_lock);
442 static int __exit sh_mipi_remove(struct platform_device *pdev)
444 struct sh_mipi_dsi_info *pdata = pdev->dev.platform_data;
445 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
446 struct sh_mipi *mipi = platform_get_drvdata(pdev);
449 mutex_lock(&array_lock);
451 for (i = 0; i < ARRAY_SIZE(mipi_dsi) && mipi_dsi[i] != mipi; i++)
454 if (i == ARRAY_SIZE(mipi_dsi)) {
461 mutex_unlock(&array_lock);
466 pdata->lcd_chan->board_cfg.display_on = NULL;
467 pdata->lcd_chan->board_cfg.display_off = NULL;
468 pdata->lcd_chan->board_cfg.board_data = NULL;
470 clk_disable(mipi->dsip_clk);
471 clk_disable(mipi->dsit_clk);
472 clk_put(mipi->dsit_clk);
473 clk_put(mipi->dsip_clk);
476 release_mem_region(res->start, resource_size(res));
477 platform_set_drvdata(pdev, NULL);
483 static struct platform_driver sh_mipi_driver = {
484 .remove = __exit_p(sh_mipi_remove),
485 .shutdown = sh_mipi_shutdown,
487 .name = "sh-mipi-dsi",
491 static int __init sh_mipi_init(void)
493 return platform_driver_probe(&sh_mipi_driver, sh_mipi_probe);
495 module_init(sh_mipi_init);
497 static void __exit sh_mipi_exit(void)
499 platform_driver_unregister(&sh_mipi_driver);
501 module_exit(sh_mipi_exit);
503 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
504 MODULE_DESCRIPTION("SuperH / ARM-shmobile MIPI DSI driver");
505 MODULE_LICENSE("GPL v2");