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authorKoen Kooi <koen@dominion.thruhere.net>2011-11-30 08:50:27 +0100
committerKoen Kooi <koen@dominion.thruhere.net>2011-11-30 08:50:27 +0100
commit4ce8fc520934fe035a481ed1bff7e3e9fb655cdc (patch)
tree5085449f6bb25dcae9123952723266d3f295407d
parent9a9069a5960455ed6e67379dd836fab6a45d5def (diff)
downloadmeta-ti-4ce8fc520934fe035a481ed1bff7e3e9fb655cdc.tar.gz
linux-ti335x-psp 3.1: add support for ST7735FB, but don't enable it in the beaglebone boardfile yet
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
Diffstat
-rw-r--r--recipes-kernel/linux/linux-ti33x-psp-3.1/beaglebone/defconfig14
-rw-r--r--recipes-kernel/linux/linux-ti33x-psp-3.1/st7735fb/0001-st7735fb-WIP-framebuffer-driver-supporting-Adafruit-.patch667
-rw-r--r--recipes-kernel/linux/linux-ti33x-psp-3.1/st7735fb/0002-beaglebone-hack-in-support-for-the-WIP-st7735fb-driv.patch73
-rw-r--r--recipes-kernel/linux/linux-ti33x-psp_3.1.bb3
4 files changed, 751 insertions, 6 deletions
diff --git a/recipes-kernel/linux/linux-ti33x-psp-3.1/beaglebone/defconfig b/recipes-kernel/linux/linux-ti33x-psp-3.1/beaglebone/defconfig
index 00872ca9..fcff5914 100644
--- a/recipes-kernel/linux/linux-ti33x-psp-3.1/beaglebone/defconfig
+++ b/recipes-kernel/linux/linux-ti33x-psp-3.1/beaglebone/defconfig
@@ -2239,11 +2239,14 @@ CONFIG_FB_CFB_FILLRECT=y
2239CONFIG_FB_CFB_COPYAREA=y 2239CONFIG_FB_CFB_COPYAREA=y
2240CONFIG_FB_CFB_IMAGEBLIT=y 2240CONFIG_FB_CFB_IMAGEBLIT=y
2241# CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set 2241# CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set
2242CONFIG_FB_SYS_FILLRECT=m 2242CONFIG_FB_SYS_FILLRECT=y
2243CONFIG_FB_SYS_COPYAREA=m 2243CONFIG_FB_SYS_COPYAREA=y
2244CONFIG_FB_SYS_IMAGEBLIT=m 2244CONFIG_FB_SYS_IMAGEBLIT=y
2245# CONFIG_FB_FOREIGN_ENDIAN is not set 2245CONFIG_FB_FOREIGN_ENDIAN=y
2246CONFIG_FB_SYS_FOPS=m 2246CONFIG_FB_BOTH_ENDIAN=y
2247# CONFIG_FB_BIG_ENDIAN is not set
2248# CONFIG_FB_LITTLE_ENDIAN is not set
2249CONFIG_FB_SYS_FOPS=y
2247# CONFIG_FB_WMT_GE_ROPS is not set 2250# CONFIG_FB_WMT_GE_ROPS is not set
2248CONFIG_FB_DEFERRED_IO=y 2251CONFIG_FB_DEFERRED_IO=y
2249# CONFIG_FB_SVGALIB is not set 2252# CONFIG_FB_SVGALIB is not set
@@ -2264,6 +2267,7 @@ CONFIG_FB_DA8XX_CONSISTENT_DMA_SIZE=4
2264# CONFIG_FB_VIRTUAL is not set 2267# CONFIG_FB_VIRTUAL is not set
2265# CONFIG_FB_METRONOME is not set 2268# CONFIG_FB_METRONOME is not set
2266# CONFIG_FB_BROADSHEET is not set 2269# CONFIG_FB_BROADSHEET is not set
2270CONFIG_FB_ST7735=y
2267# CONFIG_FB_OMAP_BOOTLOADER_INIT is not set 2271# CONFIG_FB_OMAP_BOOTLOADER_INIT is not set
2268CONFIG_OMAP2_VRAM=y 2272CONFIG_OMAP2_VRAM=y
2269CONFIG_OMAP2_VRFB=y 2273CONFIG_OMAP2_VRFB=y
diff --git a/recipes-kernel/linux/linux-ti33x-psp-3.1/st7735fb/0001-st7735fb-WIP-framebuffer-driver-supporting-Adafruit-.patch b/recipes-kernel/linux/linux-ti33x-psp-3.1/st7735fb/0001-st7735fb-WIP-framebuffer-driver-supporting-Adafruit-.patch
new file mode 100644
index 00000000..5e915339
--- /dev/null
+++ b/recipes-kernel/linux/linux-ti33x-psp-3.1/st7735fb/0001-st7735fb-WIP-framebuffer-driver-supporting-Adafruit-.patch
@@ -0,0 +1,667 @@
1From a99fbc0639e6c42cd7c53c8d1d4852d04e9f8bb1 Mon Sep 17 00:00:00 2001
2From: Matt Porter <mporter@ti.com>
3Date: Mon, 21 Nov 2011 12:55:23 -0500
4Subject: [PATCH 1/2] st7735fb: WIP framebuffer driver supporting Adafruit 1.8" SPI LCD
5
6Signed-off-by: Matt Porter <mporter@ti.com>
7Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
8---
9 drivers/video/Kconfig | 11 +
10 drivers/video/Makefile | 1 +
11 drivers/video/st7735fb.c | 516 ++++++++++++++++++++++++++++++++++++++++++++++
12 include/video/st7735fb.h | 86 ++++++++
13 4 files changed, 614 insertions(+), 0 deletions(-)
14 create mode 100644 drivers/video/st7735fb.c
15 create mode 100644 include/video/st7735fb.h
16
17diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
18index 792b7841..4ac5eb1 100644
19--- a/drivers/video/Kconfig
20+++ b/drivers/video/Kconfig
21@@ -2394,6 +2394,17 @@ config FB_PUV3_UNIGFX
22 Choose this option if you want to use the Unigfx device as a
23 framebuffer device. Without the support of PCI & AGP.
24
25+config FB_ST7735
26+ tristate "ST7735 framebuffer support"
27+ depends on FB && SPI
28+ select FB_SYS_FILLRECT
29+ select FB_SYS_COPYAREA
30+ select FB_SYS_IMAGEBLIT
31+ select FB_SYS_FOPS
32+ select FB_DEFERRED_IO
33+ help
34+ Framebuffer support for the ST7735 display controller in SPI mode.
35+
36 source "drivers/video/omap/Kconfig"
37 source "drivers/video/omap2/Kconfig"
38
39diff --git a/drivers/video/Makefile b/drivers/video/Makefile
40index 8b83129..6b67f05 100644
41--- a/drivers/video/Makefile
42+++ b/drivers/video/Makefile
43@@ -141,6 +141,7 @@ obj-$(CONFIG_FB_MSM) += msm/
44 obj-$(CONFIG_FB_NUC900) += nuc900fb.o
45 obj-$(CONFIG_FB_JZ4740) += jz4740_fb.o
46 obj-$(CONFIG_FB_PUV3_UNIGFX) += fb-puv3.o
47+obj-$(CONFIG_FB_ST7735) += st7735fb.o
48
49 # Platform or fallback drivers go here
50 obj-$(CONFIG_FB_UVESA) += uvesafb.o
51diff --git a/drivers/video/st7735fb.c b/drivers/video/st7735fb.c
52new file mode 100644
53index 0000000..500cc88
54--- /dev/null
55+++ b/drivers/video/st7735fb.c
56@@ -0,0 +1,516 @@
57+/*
58+ * linux/drivers/video/st7735fb.c -- FB driver for ST7735 LCD controller
59+ * Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven.
60+ *
61+ * Copyright (C) 2011, Matt Porter
62+ *
63+ * This file is subject to the terms and conditions of the GNU General Public
64+ * License. See the file COPYING in the main directory of this archive for
65+ * more details.
66+ */
67+
68+#include <linux/module.h>
69+#include <linux/kernel.h>
70+#include <linux/errno.h>
71+#include <linux/string.h>
72+#include <linux/mm.h>
73+#include <linux/vmalloc.h>
74+#include <linux/slab.h>
75+#include <linux/init.h>
76+#include <linux/fb.h>
77+#include <linux/gpio.h>
78+#include <linux/spi/spi.h>
79+#include <linux/delay.h>
80+#include <linux/uaccess.h>
81+
82+#include <video/st7735fb.h>
83+
84+static struct st7735_function st7735_cfg_script[] = {
85+ { ST7735_START, ST7735_START},
86+ { ST7735_CMD, ST7735_SWRESET},
87+ { ST7735_DELAY, 150},
88+ { ST7735_CMD, ST7735_SLPOUT},
89+ { ST7735_DELAY, 500},
90+ { ST7735_CMD, ST7735_FRMCTR1},
91+ { ST7735_DATA, 0x01},
92+ { ST7735_DATA, 0x2c},
93+ { ST7735_DATA, 0x2d},
94+ { ST7735_CMD, ST7735_FRMCTR2},
95+ { ST7735_DATA, 0x01},
96+ { ST7735_DATA, 0x2c},
97+ { ST7735_DATA, 0x2d},
98+ { ST7735_CMD, ST7735_FRMCTR3},
99+ { ST7735_DATA, 0x01},
100+ { ST7735_DATA, 0x2c},
101+ { ST7735_DATA, 0x2d},
102+ { ST7735_DATA, 0x01},
103+ { ST7735_DATA, 0x2c},
104+ { ST7735_DATA, 0x2d},
105+ { ST7735_CMD, ST7735_INVCTR},
106+ { ST7735_DATA, 0x07},
107+ { ST7735_CMD, ST7735_PWCTR1},
108+ { ST7735_DATA, 0xa2},
109+ { ST7735_DATA, 0x02},
110+ { ST7735_DATA, 0x84},
111+ { ST7735_CMD, ST7735_PWCTR2},
112+ { ST7735_DATA, 0xc5},
113+ { ST7735_CMD, ST7735_PWCTR3},
114+ { ST7735_DATA, 0x0a},
115+ { ST7735_DATA, 0x00},
116+ { ST7735_CMD, ST7735_PWCTR4},
117+ { ST7735_DATA, 0x8a},
118+ { ST7735_DATA, 0x2a},
119+ { ST7735_CMD, ST7735_PWCTR5},
120+ { ST7735_DATA, 0x8a},
121+ { ST7735_DATA, 0xee},
122+ { ST7735_CMD, ST7735_VMCTR1},
123+ { ST7735_DATA, 0x0e},
124+ { ST7735_CMD, ST7735_INVOFF},
125+ { ST7735_CMD, ST7735_MADCTL},
126+ { ST7735_DATA, 0xc8},
127+ { ST7735_CMD, ST7735_COLMOD},
128+ { ST7735_DATA, 0x05},
129+ { ST7735_CMD, ST7735_CASET},
130+ { ST7735_DATA, 0x00},
131+ { ST7735_DATA, 0x00},
132+ { ST7735_DATA, 0x00},
133+ { ST7735_DATA, 0x00},
134+ { ST7735_DATA, 0x7f},
135+ { ST7735_CMD, ST7735_RASET},
136+ { ST7735_DATA, 0x00},
137+ { ST7735_DATA, 0x00},
138+ { ST7735_DATA, 0x00},
139+ { ST7735_DATA, 0x00},
140+ { ST7735_DATA, 0x9f},
141+ { ST7735_CMD, ST7735_GMCTRP1},
142+ { ST7735_DATA, 0x02},
143+ { ST7735_DATA, 0x1c},
144+ { ST7735_DATA, 0x07},
145+ { ST7735_DATA, 0x12},
146+ { ST7735_DATA, 0x37},
147+ { ST7735_DATA, 0x32},
148+ { ST7735_DATA, 0x29},
149+ { ST7735_DATA, 0x2d},
150+ { ST7735_DATA, 0x29},
151+ { ST7735_DATA, 0x25},
152+ { ST7735_DATA, 0x2b},
153+ { ST7735_DATA, 0x39},
154+ { ST7735_DATA, 0x00},
155+ { ST7735_DATA, 0x01},
156+ { ST7735_DATA, 0x03},
157+ { ST7735_DATA, 0x10},
158+ { ST7735_CMD, ST7735_GMCTRN1},
159+ { ST7735_DATA, 0x03},
160+ { ST7735_DATA, 0x1d},
161+ { ST7735_DATA, 0x07},
162+ { ST7735_DATA, 0x06},
163+ { ST7735_DATA, 0x2e},
164+ { ST7735_DATA, 0x2c},
165+ { ST7735_DATA, 0x29},
166+ { ST7735_DATA, 0x2d},
167+ { ST7735_DATA, 0x2e},
168+ { ST7735_DATA, 0x2e},
169+ { ST7735_DATA, 0x37},
170+ { ST7735_DATA, 0x3f},
171+ { ST7735_DATA, 0x00},
172+ { ST7735_DATA, 0x00},
173+ { ST7735_DATA, 0x02},
174+ { ST7735_DATA, 0x10},
175+ { ST7735_CMD, ST7735_DISPON},
176+ { ST7735_DELAY, 100},
177+ { ST7735_CMD, ST7735_NORON},
178+ { ST7735_DELAY, 10},
179+ { ST7735_END, ST7735_END},
180+};
181+
182+static struct fb_fix_screeninfo st7735fb_fix __devinitdata = {
183+ .id = "ST7735",
184+ .type = FB_TYPE_PACKED_PIXELS,
185+ .visual = FB_VISUAL_PSEUDOCOLOR,
186+ .xpanstep = 0,
187+ .ypanstep = 0,
188+ .ywrapstep = 0,
189+ .line_length = WIDTH*BPP/8,
190+ .accel = FB_ACCEL_NONE,
191+};
192+
193+static struct fb_var_screeninfo st7735fb_var __devinitdata = {
194+ .xres = WIDTH,
195+ .yres = HEIGHT,
196+ .xres_virtual = WIDTH,
197+ .yres_virtual = HEIGHT,
198+ .bits_per_pixel = BPP,
199+ .nonstd = 1,
200+};
201+
202+static int st7735_write(struct st7735fb_par *par, u8 data)
203+{
204+ u8 txbuf[2]; /* allocation from stack must go */
205+
206+ txbuf[0] = data;
207+
208+ return spi_write(par->spi, &txbuf[0], 1);
209+}
210+
211+static void st7735_write_data(struct st7735fb_par *par, u8 data)
212+{
213+ int ret = 0;
214+
215+ /* Set data mode */
216+ gpio_set_value(par->dc, 1);
217+
218+ ret = st7735_write(par, data);
219+ if (ret < 0)
220+ pr_err("%s: write data %02x failed with status %d\n",
221+ par->info->fix.id, data, ret);
222+}
223+
224+static int st7735_write_data_buf(struct st7735fb_par *par,
225+ u8 *txbuf, int size)
226+{
227+ /* Set data mode */
228+ gpio_set_value(par->dc, 1);
229+
230+ /* Write entire buffer */
231+ return spi_write(par->spi, txbuf, size);
232+}
233+
234+static void st7735_write_cmd(struct st7735fb_par *par, u8 data)
235+{
236+ int ret = 0;
237+
238+ /* Set command mode */
239+ gpio_set_value(par->dc, 0);
240+
241+ ret = st7735_write(par, data);
242+ if (ret < 0)
243+ pr_err("%s: write command %02x failed with status %d\n",
244+ par->info->fix.id, data, ret);
245+}
246+
247+static void st7735_run_cfg_script(struct st7735fb_par *par)
248+{
249+ int i = 0;
250+ int end_script = 0;
251+
252+ do {
253+ switch (st7735_cfg_script[i].cmd)
254+ {
255+ case ST7735_START:
256+ break;
257+ case ST7735_CMD:
258+ st7735_write_cmd(par,
259+ st7735_cfg_script[i].data & 0xff);
260+ break;
261+ case ST7735_DATA:
262+ st7735_write_data(par,
263+ st7735_cfg_script[i].data & 0xff);
264+ break;
265+ case ST7735_DELAY:
266+ mdelay(st7735_cfg_script[i].data);
267+ break;
268+ case ST7735_END:
269+ end_script = 1;
270+ }
271+ i++;
272+ } while (!end_script);
273+}
274+
275+static void st7735_set_addr_win(struct st7735fb_par *par,
276+ int xs, int ys, int xe, int ye)
277+{
278+ st7735_write_cmd(par, ST7735_CASET);
279+ st7735_write_data(par, 0x00);
280+ st7735_write_data(par, xs+2);
281+ st7735_write_data(par, 0x00);
282+ st7735_write_data(par, xe+2);
283+ st7735_write_cmd(par, ST7735_RASET);
284+ st7735_write_data(par, 0x00);
285+ st7735_write_data(par, ys+1);
286+ st7735_write_data(par, 0x00);
287+ st7735_write_data(par, ye+1);
288+}
289+
290+static void st7735_reset(struct st7735fb_par *par)
291+{
292+ /* Reset controller */
293+ gpio_set_value(par->rst, 0);
294+ udelay(10);
295+ gpio_set_value(par->rst, 1);
296+ mdelay(120);
297+}
298+
299+static void st7735fb_update_display(struct st7735fb_par *par)
300+{
301+ int ret = 0;
302+ u8 *vmem = par->info->screen_base;
303+
304+ /*
305+ TODO:
306+ Allow a subset of pages to be passed in
307+ (for deferred I/O). Check pages against
308+ pan display settings to see if they
309+ should be updated.
310+ */
311+ /* For now, just write the full 40KiB on each update */
312+
313+ /* Set row/column data window */
314+ st7735_set_addr_win(par, 0, 0, WIDTH-1, HEIGHT-1);
315+
316+ /* Internal RAM write command */
317+ st7735_write_cmd(par, ST7735_RAMWR);
318+
319+ /* Blast framebuffer to ST7735 internal display RAM */
320+ ret = st7735_write_data_buf(par, vmem, WIDTH*HEIGHT*BPP/8);
321+ if (ret < 0)
322+ pr_err("%s: spi_write failed to update display buffer\n",
323+ par->info->fix.id);
324+}
325+
326+static void st7735fb_deferred_io(struct fb_info *info,
327+ struct list_head *pagelist)
328+{
329+ st7735fb_update_display(info->par);
330+}
331+
332+static int st7735fb_init_display(struct st7735fb_par *par)
333+{
334+ /* TODO: Need some error checking on gpios */
335+
336+ /* Request GPIOs and initialize to default values */
337+ gpio_request_one(par->rst, GPIOF_OUT_INIT_HIGH,
338+ "ST7735 Reset Pin");
339+ gpio_request_one(par->dc, GPIOF_OUT_INIT_LOW,
340+ "ST7735 Data/Command Pin");
341+
342+ st7735_reset(par);
343+
344+ st7735_run_cfg_script(par);
345+
346+ return 0;
347+}
348+
349+void st7735fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
350+{
351+ struct st7735fb_par *par = info->par;
352+
353+ sys_fillrect(info, rect);
354+
355+ st7735fb_update_display(par);
356+}
357+
358+void st7735fb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
359+{
360+ struct st7735fb_par *par = info->par;
361+
362+ sys_copyarea(info, area);
363+
364+ st7735fb_update_display(par);
365+}
366+
367+void st7735fb_imageblit(struct fb_info *info, const struct fb_image *image)
368+{
369+ struct st7735fb_par *par = info->par;
370+
371+ sys_imageblit(info, image);
372+
373+ st7735fb_update_display(par);
374+}
375+
376+static ssize_t st7735fb_write(struct fb_info *info, const char __user *buf,
377+ size_t count, loff_t *ppos)
378+{
379+ struct st7735fb_par *par = info->par;
380+ unsigned long p = *ppos;
381+ void *dst;
382+ int err = 0;
383+ unsigned long total_size;
384+
385+ if (info->state != FBINFO_STATE_RUNNING)
386+ return -EPERM;
387+
388+ total_size = info->fix.smem_len;
389+
390+ if (p > total_size)
391+ return -EFBIG;
392+
393+ if (count > total_size) {
394+ err = -EFBIG;
395+ count = total_size;
396+ }
397+
398+ if (count + p > total_size) {
399+ if (!err)
400+ err = -ENOSPC;
401+
402+ count = total_size - p;
403+ }
404+
405+ dst = (void __force *) (info->screen_base + p);
406+
407+ if (copy_from_user(dst, buf, count))
408+ err = -EFAULT;
409+
410+ if (!err)
411+ *ppos += count;
412+
413+ st7735fb_update_display(par);
414+
415+ return (err) ? err : count;
416+}
417+
418+static struct fb_ops st7735fb_ops = {
419+ .owner = THIS_MODULE,
420+ .fb_read = fb_sys_read,
421+ .fb_write = st7735fb_write,
422+ .fb_fillrect = st7735fb_fillrect,
423+ .fb_copyarea = st7735fb_copyarea,
424+ .fb_imageblit = st7735fb_imageblit,
425+};
426+
427+static struct fb_deferred_io st7735fb_defio = {
428+ .delay = HZ,
429+ .deferred_io = st7735fb_deferred_io,
430+};
431+
432+static int __devinit st7735fb_probe (struct spi_device *spi)
433+{
434+ int chip = spi_get_device_id(spi)->driver_data;
435+ struct st7735fb_platform_data *pdata = spi->dev.platform_data;
436+ int vmem_size = WIDTH*HEIGHT*BPP/8;
437+ u8 *vmem;
438+ struct fb_info *info;
439+ struct st7735fb_par *par;
440+ int retval = -ENOMEM;
441+
442+ if (chip != ST7735_DISPLAY_AF_TFT18) {
443+ pr_err("%s: only the %s device is supported\n", DRVNAME,
444+ to_spi_driver(spi->dev.driver)->id_table->name);
445+ return -EINVAL;
446+ }
447+
448+ if (!pdata) {
449+ pr_err("%s: platform data required for rst and dc info\n",
450+ DRVNAME);
451+ return -EINVAL;
452+ }
453+
454+ vmem = vzalloc(vmem_size);
455+ if (!vmem)
456+ return retval;
457+
458+ info = framebuffer_alloc(sizeof(struct st7735fb_par), &spi->dev);
459+ if (!info)
460+ goto fballoc_fail;
461+
462+ info->screen_base = (u8 __force __iomem *)vmem;
463+ info->fbops = &st7735fb_ops;
464+ info->fix = st7735fb_fix;
465+ info->fix.smem_len = vmem_size;
466+ info->var = st7735fb_var;
467+ /* Choose any packed pixel format as long as it's RGB565 */
468+ info->var.red.offset = 11;
469+ info->var.red.length = 5;
470+ info->var.green.offset = 5;
471+ info->var.green.length = 6;
472+ info->var.blue.offset = 0;
473+ info->var.blue.length = 5;
474+ info->var.transp.offset = 0;
475+ info->var.transp.length = 0;
476+ info->flags = FBINFO_FLAG_DEFAULT |
477+#ifdef __LITTLE_ENDIAN
478+ FBINFO_FOREIGN_ENDIAN |
479+#endif
480+ FBINFO_VIRTFB;
481+
482+ info->fbdefio = &st7735fb_defio;
483+ fb_deferred_io_init(info);
484+
485+ par = info->par;
486+ par->info = info;
487+ par->spi = spi;
488+ par->rst = pdata->rst_gpio;
489+ par->dc = pdata->dc_gpio;
490+
491+ retval = register_framebuffer(info);
492+ if (retval < 0)
493+ goto fbreg_fail;
494+
495+ spi_set_drvdata(spi, info);
496+
497+ retval = st7735fb_init_display(par);
498+ if (retval < 0)
499+ goto init_fail;
500+
501+ printk(KERN_INFO
502+ "fb%d: %s frame buffer device,\n\tusing %d KiB of video memory\n",
503+ info->node, info->fix.id, vmem_size);
504+
505+ return 0;
506+
507+
508+ /* TODO: release gpios on fail */
509+init_fail:
510+ spi_set_drvdata(spi, NULL);
511+
512+fbreg_fail:
513+ framebuffer_release(info);
514+
515+fballoc_fail:
516+ vfree(vmem);
517+
518+ return retval;
519+}
520+
521+static int __devexit st7735fb_remove(struct spi_device *spi)
522+{
523+ struct fb_info *info = spi_get_drvdata(spi);
524+
525+ spi_set_drvdata(spi, NULL);
526+
527+ if (info) {
528+ unregister_framebuffer(info);
529+ vfree(info->screen_base);
530+ framebuffer_release(info);
531+ }
532+
533+ /* TODO: release gpios */
534+
535+ return 0;
536+}
537+
538+static const struct spi_device_id st7735fb_ids[] = {
539+ { "adafruit_tft18", ST7735_DISPLAY_AF_TFT18 },
540+ { },
541+};
542+
543+MODULE_DEVICE_TABLE(spi, st7735fb_ids);
544+
545+static struct spi_driver st7735fb_driver = {
546+ .driver = {
547+ .name = "st7735fb",
548+ .owner = THIS_MODULE,
549+ },
550+ .id_table = st7735fb_ids,
551+ .probe = st7735fb_probe,
552+ .remove = __devexit_p(st7735fb_remove),
553+};
554+
555+static int __init st7735fb_init(void)
556+{
557+ return spi_register_driver(&st7735fb_driver);
558+}
559+
560+static void __exit st7735fb_exit(void)
561+{
562+ spi_unregister_driver(&st7735fb_driver);
563+}
564+
565+/* ------------------------------------------------------------------------- */
566+
567+module_init(st7735fb_init);
568+module_exit(st7735fb_exit);
569+
570+MODULE_DESCRIPTION("FB driver for ST7735 display controller");
571+MODULE_AUTHOR("Matt Porter");
572+MODULE_LICENSE("GPL");
573diff --git a/include/video/st7735fb.h b/include/video/st7735fb.h
574new file mode 100644
575index 0000000..250f036
576--- /dev/null
577+++ b/include/video/st7735fb.h
578@@ -0,0 +1,86 @@
579+/*
580+ * linux/include/video/st7735fb.h -- FB driver for ST7735 LCD controller
581+ *
582+ * Copyright (C) 2011, Matt Porter
583+ *
584+ * This file is subject to the terms and conditions of the GNU General Public
585+ * License. See the file COPYING in the main directory of this archive for
586+ * more details.
587+ */
588+
589+#define DRVNAME "st7735fb"
590+#define WIDTH 128
591+#define HEIGHT 160
592+#define BPP 16
593+
594+/* Supported display modules */
595+#define ST7735_DISPLAY_AF_TFT18 0 /* Adafruit SPI TFT 1.8" */
596+
597+/* Init script function */
598+struct st7735_function {
599+ u16 cmd;
600+ u16 data;
601+};
602+
603+/* Init script commands */
604+enum st7735_cmd {
605+ ST7735_START,
606+ ST7735_END,
607+ ST7735_CMD,
608+ ST7735_DATA,
609+ ST7735_DELAY
610+};
611+
612+struct st7735fb_par {
613+ struct spi_device *spi;
614+ struct fb_info *info;
615+ int rst;
616+ int dc;
617+};
618+
619+struct st7735fb_platform_data {
620+ int rst_gpio;
621+ int dc_gpio;
622+};
623+
624+/* ST7735 Commands */
625+#define ST7735_NOP 0x0
626+#define ST7735_SWRESET 0x01
627+#define ST7735_RDDID 0x04
628+#define ST7735_RDDST 0x09
629+#define ST7735_SLPIN 0x10
630+#define ST7735_SLPOUT 0x11
631+#define ST7735_PTLON 0x12
632+#define ST7735_NORON 0x13
633+#define ST7735_INVOFF 0x20
634+#define ST7735_INVON 0x21
635+#define ST7735_DISPOFF 0x28
636+#define ST7735_DISPON 0x29
637+#define ST7735_CASET 0x2A
638+#define ST7735_RASET 0x2B
639+#define ST7735_RAMWR 0x2C
640+#define ST7735_RAMRD 0x2E
641+#define ST7735_COLMOD 0x3A
642+#define ST7735_MADCTL 0x36
643+#define ST7735_FRMCTR1 0xB1
644+#define ST7735_FRMCTR2 0xB2
645+#define ST7735_FRMCTR3 0xB3
646+#define ST7735_INVCTR 0xB4
647+#define ST7735_DISSET5 0xB6
648+#define ST7735_PWCTR1 0xC0
649+#define ST7735_PWCTR2 0xC1
650+#define ST7735_PWCTR3 0xC2
651+#define ST7735_PWCTR4 0xC3
652+#define ST7735_PWCTR5 0xC4
653+#define ST7735_VMCTR1 0xC5
654+#define ST7735_RDID1 0xDA
655+#define ST7735_RDID2 0xDB
656+#define ST7735_RDID3 0xDC
657+#define ST7735_RDID4 0xDD
658+#define ST7735_GMCTRP1 0xE0
659+#define ST7735_GMCTRN1 0xE1
660+#define ST7735_PWCTR6 0xFC
661+
662+
663+
664+
665--
6661.7.2.5
667
diff --git a/recipes-kernel/linux/linux-ti33x-psp-3.1/st7735fb/0002-beaglebone-hack-in-support-for-the-WIP-st7735fb-driv.patch b/recipes-kernel/linux/linux-ti33x-psp-3.1/st7735fb/0002-beaglebone-hack-in-support-for-the-WIP-st7735fb-driv.patch
new file mode 100644
index 00000000..1def7e26
--- /dev/null
+++ b/recipes-kernel/linux/linux-ti33x-psp-3.1/st7735fb/0002-beaglebone-hack-in-support-for-the-WIP-st7735fb-driv.patch
@@ -0,0 +1,73 @@
1From dd3f24640c209d8186010dbf2bbabe11f3eb52ce Mon Sep 17 00:00:00 2001
2From: Matt Porter <mporter@ti.com>
3Date: Mon, 21 Nov 2011 12:56:52 -0500
4Subject: [PATCH 2/2] beaglebone: hack in support for the WIP st7735fb driver
5
6Signed-off-by: Matt Porter <mporter@ti.com>
7---
8 arch/arm/mach-omap2/board-am335xevm.c | 28 ++++++++++++++++++++++++++++
9 1 files changed, 28 insertions(+), 0 deletions(-)
10
11diff --git a/arch/arm/mach-omap2/board-am335xevm.c b/arch/arm/mach-omap2/board-am335xevm.c
12index b27fb97..f049aad 100644
13--- a/arch/arm/mach-omap2/board-am335xevm.c
14+++ b/arch/arm/mach-omap2/board-am335xevm.c
15@@ -51,6 +51,7 @@
16
17 /* LCD controller is similar to DA850 */
18 #include <video/da8xx-fb.h>
19+#include <video/st7735fb.h>
20
21 #include "control.h"
22 #include "board-flash.h"
23@@ -1094,6 +1095,23 @@ static struct spi_board_info am335x_spi1_slave_info[] = {
24 },
25 };
26
27+static const struct st7735fb_platform_data bone_st7735fb_data = {
28+ .rst_gpio = GPIO_TO_PIN(3, 19),
29+ .dc_gpio = GPIO_TO_PIN(3, 21),
30+};
31+
32+static struct spi_board_info bone_spi1_slave_info[] = {
33+ {
34+ .modalias = "adafruit_tft18",
35+ .platform_data = &bone_st7735fb_data,
36+ .irq = -1,
37+ .max_speed_hz = 8000000,
38+ .bus_num = 2,
39+ .chip_select = 0,
40+ .mode = SPI_MODE_3,
41+ },
42+};
43+
44 static void evm_nand_init(int evm_id, int profile)
45 {
46 setup_pin_mux(nand_pin_mux);
47@@ -1410,6 +1428,14 @@ static void spi1_init(int evm_id, int profile)
48 return;
49 }
50
51+/* setup bone spi1 */
52+static void bone_spi1_init(int evm_id, int profile)
53+{
54+ setup_pin_mux(spi1_pin_mux);
55+ spi_register_board_info(bone_spi1_slave_info,
56+ ARRAY_SIZE(bone_spi1_slave_info));
57+ return;
58+}
59
60 static int beaglebone_phy_fixup(struct phy_device *phydev)
61 {
62@@ -1567,6 +1593,8 @@ static struct evm_dev_cfg beaglebone_dev_cfg[] = {
63 {i2c2_init, DEV_ON_BASEBOARD, PROFILE_NONE},
64 {mmc0_init, DEV_ON_BASEBOARD, PROFILE_NONE},
65 {boneleds_init, DEV_ON_BASEBOARD, PROFILE_ALL},
66+ /* HACK ALERT */
67+ {bone_spi1_init, DEV_ON_BASEBOARD, PROFILE_NONE},
68 {NULL, 0, 0},
69 };
70
71--
721.7.2.5
73
diff --git a/recipes-kernel/linux/linux-ti33x-psp_3.1.bb b/recipes-kernel/linux/linux-ti33x-psp_3.1.bb
index e1ad8968..46687493 100644
--- a/recipes-kernel/linux/linux-ti33x-psp_3.1.bb
+++ b/recipes-kernel/linux/linux-ti33x-psp_3.1.bb
@@ -11,7 +11,7 @@ MULTI_CONFIG_BASE_SUFFIX = ""
11 11
12BRANCH = "v3.1-meta-ti-r1r+gitr1d84d8853fa30cf3db2571a5aec572accca4e29d" 12BRANCH = "v3.1-meta-ti-r1r+gitr1d84d8853fa30cf3db2571a5aec572accca4e29d"
13SRCREV = "1d84d8853fa30cf3db2571a5aec572accca4e29d" 13SRCREV = "1d84d8853fa30cf3db2571a5aec572accca4e29d"
14MACHINE_KERNEL_PR_append = "d+gitr${SRCREV}" 14MACHINE_KERNEL_PR_append = "e+gitr${SRCREV}"
15 15
16COMPATIBLE_MACHINE = "(ti33x)" 16COMPATIBLE_MACHINE = "(ti33x)"
17 17
@@ -54,6 +54,7 @@ PATCHES_OVER_PSP = " \
54 file://adc/0008-tscadc-Trigger-through-sysfs.patch \ 54 file://adc/0008-tscadc-Trigger-through-sysfs.patch \
55 file://adc/0009-meta-ti-Remove-debug-messages-for-meta-ti.patch \ 55 file://adc/0009-meta-ti-Remove-debug-messages-for-meta-ti.patch \
56 file://adc/0010-tscadc-switch-to-polling-instead-of-interrupts.patch \ 56 file://adc/0010-tscadc-switch-to-polling-instead-of-interrupts.patch \
57 file://st7735fb/0001-st7735fb-WIP-framebuffer-driver-supporting-Adafruit-.patch \
57 " 58 "
58 59
59SRC_URI += "${@base_contains('DISTRO_FEATURES', 'tipspkernel', "", "${PATCHES_OVER_PSP}", d)}" 60SRC_URI += "${@base_contains('DISTRO_FEATURES', 'tipspkernel', "", "${PATCHES_OVER_PSP}", d)}"
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2026-07-26 21:02:32 +0000