fbdev: add new TMIO framebuffer driver
Add driver for TMIO framebuffer cells as found e.g. in Toshiba TC6393XB
chips.
Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Cc: Ian Molton <spyro@f2s.com>
Acked-by: Samuel Ortiz <sameo@openedhand.com>
Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/video/tmiofb.c b/drivers/video/tmiofb.c
new file mode 100644
index 0000000..2a38001
--- /dev/null
+++ b/drivers/video/tmiofb.c
@@ -0,0 +1,1050 @@
+/*
+ * Frame Buffer Device for Toshiba Mobile IO(TMIO) controller
+ *
+ * Copyright(C) 2005-2006 Chris Humbert
+ * Copyright(C) 2005 Dirk Opfer
+ * Copytight(C) 2007,2008 Dmitry Baryshkov
+ *
+ * Based on:
+ * drivers/video/w100fb.c
+ * code written by Sharp/Lineo for 2.4 kernels
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/fb.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+/* Why should fb driver call console functions? because acquire_console_sem() */
+#include <linux/console.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/tmio.h>
+#include <linux/uaccess.h>
+
+/*
+ * accelerator commands
+ */
+#define TMIOFB_ACC_CSADR(x) (0x00000000 | ((x) & 0x001ffffe))
+#define TMIOFB_ACC_CHPIX(x) (0x01000000 | ((x) & 0x000003ff))
+#define TMIOFB_ACC_CVPIX(x) (0x02000000 | ((x) & 0x000003ff))
+#define TMIOFB_ACC_PSADR(x) (0x03000000 | ((x) & 0x00fffffe))
+#define TMIOFB_ACC_PHPIX(x) (0x04000000 | ((x) & 0x000003ff))
+#define TMIOFB_ACC_PVPIX(x) (0x05000000 | ((x) & 0x000003ff))
+#define TMIOFB_ACC_PHOFS(x) (0x06000000 | ((x) & 0x000003ff))
+#define TMIOFB_ACC_PVOFS(x) (0x07000000 | ((x) & 0x000003ff))
+#define TMIOFB_ACC_POADR(x) (0x08000000 | ((x) & 0x00fffffe))
+#define TMIOFB_ACC_RSTR(x) (0x09000000 | ((x) & 0x000000ff))
+#define TMIOFB_ACC_TCLOR(x) (0x0A000000 | ((x) & 0x0000ffff))
+#define TMIOFB_ACC_FILL(x) (0x0B000000 | ((x) & 0x0000ffff))
+#define TMIOFB_ACC_DSADR(x) (0x0C000000 | ((x) & 0x00fffffe))
+#define TMIOFB_ACC_SSADR(x) (0x0D000000 | ((x) & 0x00fffffe))
+#define TMIOFB_ACC_DHPIX(x) (0x0E000000 | ((x) & 0x000003ff))
+#define TMIOFB_ACC_DVPIX(x) (0x0F000000 | ((x) & 0x000003ff))
+#define TMIOFB_ACC_SHPIX(x) (0x10000000 | ((x) & 0x000003ff))
+#define TMIOFB_ACC_SVPIX(x) (0x11000000 | ((x) & 0x000003ff))
+#define TMIOFB_ACC_LBINI(x) (0x12000000 | ((x) & 0x0000ffff))
+#define TMIOFB_ACC_LBK2(x) (0x13000000 | ((x) & 0x0000ffff))
+#define TMIOFB_ACC_SHBINI(x) (0x14000000 | ((x) & 0x0000ffff))
+#define TMIOFB_ACC_SHBK2(x) (0x15000000 | ((x) & 0x0000ffff))
+#define TMIOFB_ACC_SVBINI(x) (0x16000000 | ((x) & 0x0000ffff))
+#define TMIOFB_ACC_SVBK2(x) (0x17000000 | ((x) & 0x0000ffff))
+
+#define TMIOFB_ACC_CMGO 0x20000000
+#define TMIOFB_ACC_CMGO_CEND 0x00000001
+#define TMIOFB_ACC_CMGO_INT 0x00000002
+#define TMIOFB_ACC_CMGO_CMOD 0x00000010
+#define TMIOFB_ACC_CMGO_CDVRV 0x00000020
+#define TMIOFB_ACC_CMGO_CDHRV 0x00000040
+#define TMIOFB_ACC_CMGO_RUND 0x00008000
+#define TMIOFB_ACC_SCGO 0x21000000
+#define TMIOFB_ACC_SCGO_CEND 0x00000001
+#define TMIOFB_ACC_SCGO_INT 0x00000002
+#define TMIOFB_ACC_SCGO_ROP3 0x00000004
+#define TMIOFB_ACC_SCGO_TRNS 0x00000008
+#define TMIOFB_ACC_SCGO_DVRV 0x00000010
+#define TMIOFB_ACC_SCGO_DHRV 0x00000020
+#define TMIOFB_ACC_SCGO_SVRV 0x00000040
+#define TMIOFB_ACC_SCGO_SHRV 0x00000080
+#define TMIOFB_ACC_SCGO_DSTXY 0x00008000
+#define TMIOFB_ACC_SBGO 0x22000000
+#define TMIOFB_ACC_SBGO_CEND 0x00000001
+#define TMIOFB_ACC_SBGO_INT 0x00000002
+#define TMIOFB_ACC_SBGO_DVRV 0x00000010
+#define TMIOFB_ACC_SBGO_DHRV 0x00000020
+#define TMIOFB_ACC_SBGO_SVRV 0x00000040
+#define TMIOFB_ACC_SBGO_SHRV 0x00000080
+#define TMIOFB_ACC_SBGO_SBMD 0x00000100
+#define TMIOFB_ACC_FLGO 0x23000000
+#define TMIOFB_ACC_FLGO_CEND 0x00000001
+#define TMIOFB_ACC_FLGO_INT 0x00000002
+#define TMIOFB_ACC_FLGO_ROP3 0x00000004
+#define TMIOFB_ACC_LDGO 0x24000000
+#define TMIOFB_ACC_LDGO_CEND 0x00000001
+#define TMIOFB_ACC_LDGO_INT 0x00000002
+#define TMIOFB_ACC_LDGO_ROP3 0x00000004
+#define TMIOFB_ACC_LDGO_ENDPX 0x00000008
+#define TMIOFB_ACC_LDGO_LVRV 0x00000010
+#define TMIOFB_ACC_LDGO_LHRV 0x00000020
+#define TMIOFB_ACC_LDGO_LDMOD 0x00000040
+
+/* a FIFO is always allocated, even if acceleration is not used */
+#define TMIOFB_FIFO_SIZE 512
+
+/*
+ * LCD Host Controller Configuration Register
+ *
+ * This iomem area supports only 16-bit IO.
+ */
+#define CCR_CMD 0x04 /* Command */
+#define CCR_REVID 0x08 /* Revision ID */
+#define CCR_BASEL 0x10 /* LCD Control Reg Base Addr Low */
+#define CCR_BASEH 0x12 /* LCD Control Reg Base Addr High */
+#define CCR_UGCC 0x40 /* Unified Gated Clock Control */
+#define CCR_GCC 0x42 /* Gated Clock Control */
+#define CCR_USC 0x50 /* Unified Software Clear */
+#define CCR_VRAMRTC 0x60 /* VRAM Timing Control */
+ /* 0x61 VRAM Refresh Control */
+#define CCR_VRAMSAC 0x62 /* VRAM Access Control */
+ /* 0x63 VRAM Status */
+#define CCR_VRAMBC 0x64 /* VRAM Block Control */
+
+/*
+ * LCD Control Register
+ *
+ * This iomem area supports only 16-bit IO.
+ */
+#define LCR_UIS 0x000 /* Unified Interrupt Status */
+#define LCR_VHPN 0x008 /* VRAM Horizontal Pixel Number */
+#define LCR_CFSAL 0x00a /* Command FIFO Start Address Low */
+#define LCR_CFSAH 0x00c /* Command FIFO Start Address High */
+#define LCR_CFS 0x00e /* Command FIFO Size */
+#define LCR_CFWS 0x010 /* Command FIFO Writeable Size */
+#define LCR_BBIE 0x012 /* BitBLT Interrupt Enable */
+#define LCR_BBISC 0x014 /* BitBLT Interrupt Status and Clear */
+#define LCR_CCS 0x016 /* Command Count Status */
+#define LCR_BBES 0x018 /* BitBLT Execution Status */
+#define LCR_CMDL 0x01c /* Command Low */
+#define LCR_CMDH 0x01e /* Command High */
+#define LCR_CFC 0x022 /* Command FIFO Clear */
+#define LCR_CCIFC 0x024 /* CMOS Camera IF Control */
+#define LCR_HWT 0x026 /* Hardware Test */
+#define LCR_LCDCCRC 0x100 /* LCDC Clock and Reset Control */
+#define LCR_LCDCC 0x102 /* LCDC Control */
+#define LCR_LCDCOPC 0x104 /* LCDC Output Pin Control */
+#define LCR_LCDIS 0x108 /* LCD Interrupt Status */
+#define LCR_LCDIM 0x10a /* LCD Interrupt Mask */
+#define LCR_LCDIE 0x10c /* LCD Interrupt Enable */
+#define LCR_GDSAL 0x122 /* Graphics Display Start Address Low */
+#define LCR_GDSAH 0x124 /* Graphics Display Start Address High */
+#define LCR_VHPCL 0x12a /* VRAM Horizontal Pixel Count Low */
+#define LCR_VHPCH 0x12c /* VRAM Horizontal Pixel Count High */
+#define LCR_GM 0x12e /* Graphic Mode(VRAM access enable) */
+#define LCR_HT 0x140 /* Horizontal Total */
+#define LCR_HDS 0x142 /* Horizontal Display Start */
+#define LCR_HSS 0x144 /* H-Sync Start */
+#define LCR_HSE 0x146 /* H-Sync End */
+#define LCR_HNP 0x14c /* Horizontal Number of Pixels */
+#define LCR_VT 0x150 /* Vertical Total */
+#define LCR_VDS 0x152 /* Vertical Display Start */
+#define LCR_VSS 0x154 /* V-Sync Start */
+#define LCR_VSE 0x156 /* V-Sync End */
+#define LCR_CDLN 0x160 /* Current Display Line Number */
+#define LCR_ILN 0x162 /* Interrupt Line Number */
+#define LCR_SP 0x164 /* Sync Polarity */
+#define LCR_MISC 0x166 /* MISC(RGB565 mode) */
+#define LCR_VIHSS 0x16a /* Video Interface H-Sync Start */
+#define LCR_VIVS 0x16c /* Video Interface Vertical Start */
+#define LCR_VIVE 0x16e /* Video Interface Vertical End */
+#define LCR_VIVSS 0x170 /* Video Interface V-Sync Start */
+#define LCR_VCCIS 0x17e /* Video / CMOS Camera Interface Select */
+#define LCR_VIDWSAL 0x180 /* VI Data Write Start Address Low */
+#define LCR_VIDWSAH 0x182 /* VI Data Write Start Address High */
+#define LCR_VIDRSAL 0x184 /* VI Data Read Start Address Low */
+#define LCR_VIDRSAH 0x186 /* VI Data Read Start Address High */
+#define LCR_VIPDDST 0x188 /* VI Picture Data Display Start Timing */
+#define LCR_VIPDDET 0x186 /* VI Picture Data Display End Timing */
+#define LCR_VIE 0x18c /* Video Interface Enable */
+#define LCR_VCS 0x18e /* Video/Camera Select */
+#define LCR_VPHWC 0x194 /* Video Picture Horizontal Wait Count */
+#define LCR_VPHS 0x196 /* Video Picture Horizontal Size */
+#define LCR_VPVWC 0x198 /* Video Picture Vertical Wait Count */
+#define LCR_VPVS 0x19a /* Video Picture Vertical Size */
+#define LCR_PLHPIX 0x1a0 /* PLHPIX */
+#define LCR_XS 0x1a2 /* XStart */
+#define LCR_XCKHW 0x1a4 /* XCK High Width */
+#define LCR_STHS 0x1a8 /* STH Start */
+#define LCR_VT2 0x1aa /* Vertical Total */
+#define LCR_YCKSW 0x1ac /* YCK Start Wait */
+#define LCR_YSTS 0x1ae /* YST Start */
+#define LCR_PPOLS 0x1b0 /* #PPOL Start */
+#define LCR_PRECW 0x1b2 /* PREC Width */
+#define LCR_VCLKHW 0x1b4 /* VCLK High Width */
+#define LCR_OC 0x1b6 /* Output Control */
+
+static char *mode_option __devinitdata;
+
+struct tmiofb_par {
+ u32 pseudo_palette[16];
+
+#ifdef CONFIG_FB_TMIO_ACCELL
+ wait_queue_head_t wait_acc;
+ bool use_polling;
+#endif
+
+ void __iomem *ccr;
+ void __iomem *lcr;
+};
+
+/*--------------------------------------------------------------------------*/
+
+/*
+ * reasons for an interrupt:
+ * uis bbisc lcdis
+ * 0100 0001 accelerator command completed
+ * 2000 0001 vsync start
+ * 2000 0002 display start
+ * 2000 0004 line number match(0x1ff mask???)
+ */
+static irqreturn_t tmiofb_irq(int irq, void *__info)
+{
+ struct fb_info *info = __info;
+ struct tmiofb_par *par = info->par;
+ unsigned int bbisc = tmio_ioread16(par->lcr + LCR_BBISC);
+
+
+ /*
+ * We were in polling mode and now we got correct irq.
+ * Switch back to IRQ-based sync of command FIFO
+ */
+ if (unlikely(par->use_polling && irq != -1)) {
+ printk(KERN_INFO "tmiofb: switching to waitq\n");
+ par->use_polling = false;
+ }
+
+ tmio_iowrite16(bbisc, par->lcr + LCR_BBISC);
+
+#ifdef CONFIG_FB_TMIO_ACCELL
+ if (bbisc & 1)
+ wake_up(&par->wait_acc);
+#endif
+
+ return IRQ_HANDLED;
+}
+
+
+/*--------------------------------------------------------------------------*/
+
+
+/*
+ * Turns off the LCD controller and LCD host controller.
+ */
+static int tmiofb_hw_stop(struct platform_device *dev)
+{
+ struct mfd_cell *cell = dev->dev.platform_data;
+ struct tmio_fb_data *data = cell->driver_data;
+ struct fb_info *info = platform_get_drvdata(dev);
+ struct tmiofb_par *par = info->par;
+
+ tmio_iowrite16(0, par->ccr + CCR_UGCC);
+ tmio_iowrite16(0, par->lcr + LCR_GM);
+ data->lcd_set_power(dev, 0);
+ tmio_iowrite16(0x0010, par->lcr + LCR_LCDCCRC);
+
+ return 0;
+}
+
+/*
+ * Initializes the LCD host controller.
+ */
+static int tmiofb_hw_init(struct platform_device *dev)
+{
+ struct mfd_cell *cell = dev->dev.platform_data;
+ struct fb_info *info = platform_get_drvdata(dev);
+ struct tmiofb_par *par = info->par;
+ const struct resource *nlcr = &cell->resources[0];
+ const struct resource *vram = &cell->resources[2];
+ unsigned long base;
+
+ if (nlcr == NULL || vram == NULL)
+ return -EINVAL;
+
+ base = nlcr->start;
+
+ tmio_iowrite16(0x003a, par->ccr + CCR_UGCC);
+ tmio_iowrite16(0x003a, par->ccr + CCR_GCC);
+ tmio_iowrite16(0x3f00, par->ccr + CCR_USC);
+
+ msleep(2); /* wait for device to settle */
+
+ tmio_iowrite16(0x0000, par->ccr + CCR_USC);
+ tmio_iowrite16(base >> 16, par->ccr + CCR_BASEH);
+ tmio_iowrite16(base, par->ccr + CCR_BASEL);
+ tmio_iowrite16(0x0002, par->ccr + CCR_CMD); /* base address enable */
+ tmio_iowrite16(0x40a8, par->ccr + CCR_VRAMRTC); /* VRAMRC, VRAMTC */
+ tmio_iowrite16(0x0018, par->ccr + CCR_VRAMSAC); /* VRAMSTS, VRAMAC */
+ tmio_iowrite16(0x0002, par->ccr + CCR_VRAMBC);
+ msleep(2); /* wait for device to settle */
+ tmio_iowrite16(0x000b, par->ccr + CCR_VRAMBC);
+
+ base = vram->start + info->screen_size;
+ tmio_iowrite16(base >> 16, par->lcr + LCR_CFSAH);
+ tmio_iowrite16(base, par->lcr + LCR_CFSAL);
+ tmio_iowrite16(TMIOFB_FIFO_SIZE - 1, par->lcr + LCR_CFS);
+ tmio_iowrite16(1, par->lcr + LCR_CFC);
+ tmio_iowrite16(1, par->lcr + LCR_BBIE);
+ tmio_iowrite16(0, par->lcr + LCR_CFWS);
+
+ return 0;
+}
+
+/*
+ * Sets the LCD controller's output resolution and pixel clock
+ */
+static void tmiofb_hw_mode(struct platform_device *dev)
+{
+ struct mfd_cell *cell = dev->dev.platform_data;
+ struct tmio_fb_data *data = cell->driver_data;
+ struct fb_info *info = platform_get_drvdata(dev);
+ struct fb_videomode *mode = info->mode;
+ struct tmiofb_par *par = info->par;
+ unsigned int i;
+
+ tmio_iowrite16(0, par->lcr + LCR_GM);
+ data->lcd_set_power(dev, 0);
+ tmio_iowrite16(0x0010, par->lcr + LCR_LCDCCRC);
+ data->lcd_mode(dev, mode);
+ data->lcd_set_power(dev, 1);
+
+ tmio_iowrite16(info->fix.line_length, par->lcr + LCR_VHPN);
+ tmio_iowrite16(0, par->lcr + LCR_GDSAH);
+ tmio_iowrite16(0, par->lcr + LCR_GDSAL);
+ tmio_iowrite16(info->fix.line_length >> 16, par->lcr + LCR_VHPCH);
+ tmio_iowrite16(info->fix.line_length, par->lcr + LCR_VHPCL);
+ tmio_iowrite16(i = 0, par->lcr + LCR_HSS);
+ tmio_iowrite16(i += mode->hsync_len, par->lcr + LCR_HSE);
+ tmio_iowrite16(i += mode->left_margin, par->lcr + LCR_HDS);
+ tmio_iowrite16(i += mode->xres + mode->right_margin, par->lcr + LCR_HT);
+ tmio_iowrite16(mode->xres, par->lcr + LCR_HNP);
+ tmio_iowrite16(i = 0, par->lcr + LCR_VSS);
+ tmio_iowrite16(i += mode->vsync_len, par->lcr + LCR_VSE);
+ tmio_iowrite16(i += mode->upper_margin, par->lcr + LCR_VDS);
+ tmio_iowrite16(i += mode->yres, par->lcr + LCR_ILN);
+ tmio_iowrite16(i += mode->lower_margin, par->lcr + LCR_VT);
+ tmio_iowrite16(3, par->lcr + LCR_MISC); /* RGB565 mode */
+ tmio_iowrite16(1, par->lcr + LCR_GM); /* VRAM enable */
+ tmio_iowrite16(0x4007, par->lcr + LCR_LCDCC);
+ tmio_iowrite16(3, par->lcr + LCR_SP); /* sync polarity */
+
+ tmio_iowrite16(0x0010, par->lcr + LCR_LCDCCRC);
+ msleep(5); /* wait for device to settle */
+ tmio_iowrite16(0x0014, par->lcr + LCR_LCDCCRC); /* STOP_CKP */
+ msleep(5); /* wait for device to settle */
+ tmio_iowrite16(0x0015, par->lcr + LCR_LCDCCRC); /* STOP_CKP|SOFT_RESET*/
+ tmio_iowrite16(0xfffa, par->lcr + LCR_VCS);
+}
+
+/*--------------------------------------------------------------------------*/
+
+#ifdef CONFIG_FB_TMIO_ACCELL
+static int __must_check
+tmiofb_acc_wait(struct fb_info *info, unsigned int ccs)
+{
+ struct tmiofb_par *par = info->par;
+ /*
+ * This code can be called whith interrupts disabled.
+ * So instead of relaying on irq to trigger the event,
+ * poll the state till the necessary command is executed.
+ */
+ if (irqs_disabled() || par->use_polling) {
+ int i = 0;
+ while (tmio_ioread16(par->lcr + LCR_CCS) > ccs) {
+ udelay(1);
+ i++;
+ if (i > 10000) {
+ pr_err("tmiofb: timeout waiting for %d\n",
+ ccs);
+ return -ETIMEDOUT;
+ }
+ tmiofb_irq(-1, info);
+ }
+ } else {
+ if (!wait_event_interruptible_timeout(par->wait_acc,
+ tmio_ioread16(par->lcr + LCR_CCS) <= ccs,
+ 1000)) {
+ pr_err("tmiofb: timeout waiting for %d\n", ccs);
+ return -ETIMEDOUT;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * Writes an accelerator command to the accelerator's FIFO.
+ */
+static int
+tmiofb_acc_write(struct fb_info *info, const u32 *cmd, unsigned int count)
+{
+ struct tmiofb_par *par = info->par;
+ int ret;
+
+ ret = tmiofb_acc_wait(info, TMIOFB_FIFO_SIZE - count);
+ if (ret)
+ return ret;
+
+ for (; count; count--, cmd++) {
+ tmio_iowrite16(*cmd >> 16, par->lcr + LCR_CMDH);
+ tmio_iowrite16(*cmd, par->lcr + LCR_CMDL);
+ }
+
+ return ret;
+}
+
+/*
+ * Wait for the accelerator to finish its operations before writing
+ * to the framebuffer for consistent display output.
+ */
+static int tmiofb_sync(struct fb_info *fbi)
+{
+ struct tmiofb_par *par = fbi->par;
+
+ int ret;
+ int i = 0;
+
+ ret = tmiofb_acc_wait(fbi, 0);
+
+ while (tmio_ioread16(par->lcr + LCR_BBES) & 2) { /* blit active */
+ udelay(1);
+ i++ ;
+ if (i > 10000) {
+ printk(KERN_ERR "timeout waiting for blit to end!\n");
+ return -ETIMEDOUT;
+ }
+ }
+
+ return ret;
+}
+
+static void
+tmiofb_fillrect(struct fb_info *fbi, const struct fb_fillrect *rect)
+{
+ const u32 cmd[] = {
+ TMIOFB_ACC_DSADR((rect->dy * fbi->mode->xres + rect->dx) * 2),
+ TMIOFB_ACC_DHPIX(rect->width - 1),
+ TMIOFB_ACC_DVPIX(rect->height - 1),
+ TMIOFB_ACC_FILL(rect->color),
+ TMIOFB_ACC_FLGO,
+ };
+
+ if (fbi->state != FBINFO_STATE_RUNNING ||
+ fbi->flags & FBINFO_HWACCEL_DISABLED) {
+ cfb_fillrect(fbi, rect);
+ return;
+ }
+
+ tmiofb_acc_write(fbi, cmd, ARRAY_SIZE(cmd));
+}
+
+static void
+tmiofb_copyarea(struct fb_info *fbi, const struct fb_copyarea *area)
+{
+ const u32 cmd[] = {
+ TMIOFB_ACC_DSADR((area->dy * fbi->mode->xres + area->dx) * 2),
+ TMIOFB_ACC_DHPIX(area->width - 1),
+ TMIOFB_ACC_DVPIX(area->height - 1),
+ TMIOFB_ACC_SSADR((area->sy * fbi->mode->xres + area->sx) * 2),
+ TMIOFB_ACC_SCGO,
+ };
+
+ if (fbi->state != FBINFO_STATE_RUNNING ||
+ fbi->flags & FBINFO_HWACCEL_DISABLED) {
+ cfb_copyarea(fbi, area);
+ return;
+ }
+
+ tmiofb_acc_write(fbi, cmd, ARRAY_SIZE(cmd));
+}
+#endif
+
+static void tmiofb_clearscreen(struct fb_info *info)
+{
+ const struct fb_fillrect rect = {
+ .dx = 0,
+ .dy = 0,
+ .width = info->mode->xres,
+ .height = info->mode->yres,
+ .color = 0,
+ .rop = ROP_COPY,
+ };
+
+ info->fbops->fb_fillrect(info, &rect);
+}
+
+static int tmiofb_vblank(struct fb_info *fbi, struct fb_vblank *vblank)
+{
+ struct tmiofb_par *par = fbi->par;
+ struct fb_videomode *mode = fbi->mode;
+ unsigned int vcount = tmio_ioread16(par->lcr + LCR_CDLN);
+ unsigned int vds = mode->vsync_len + mode->upper_margin;
+
+ vblank->vcount = vcount;
+ vblank->flags = FB_VBLANK_HAVE_VBLANK | FB_VBLANK_HAVE_VCOUNT
+ | FB_VBLANK_HAVE_VSYNC;
+
+ if (vcount < mode->vsync_len)
+ vblank->flags |= FB_VBLANK_VSYNCING;
+
+ if (vcount < vds || vcount > vds + mode->yres)
+ vblank->flags |= FB_VBLANK_VBLANKING;
+
+ return 0;
+}
+
+
+static int tmiofb_ioctl(struct fb_info *fbi,
+ unsigned int cmd, unsigned long arg)
+{
+ switch (cmd) {
+ case FBIOGET_VBLANK: {
+ struct fb_vblank vblank = {0};
+ void __user *argp = (void __user *) arg;
+
+ tmiofb_vblank(fbi, &vblank);
+ if (copy_to_user(argp, &vblank, sizeof vblank))
+ return -EFAULT;
+ return 0;
+ }
+
+#ifdef CONFIG_FB_TMIO_ACCELL
+ case FBIO_TMIO_ACC_SYNC:
+ tmiofb_sync(fbi);
+ return 0;
+
+ case FBIO_TMIO_ACC_WRITE: {
+ u32 __user *argp = (void __user *) arg;
+ u32 len;
+ u32 acc[16];
+
+ if (get_user(len, argp))
+ return -EFAULT;
+ if (len > ARRAY_SIZE(acc))
+ return -EINVAL;
+ if (copy_from_user(acc, argp + 1, sizeof(u32) * len))
+ return -EFAULT;
+
+ return tmiofb_acc_write(fbi, acc, len);
+ }
+#endif
+ }
+
+ return -ENOTTY;
+}
+
+/*--------------------------------------------------------------------------*/
+
+/* Select the smallest mode that allows the desired resolution to be
+ * displayed. If desired, the x and y parameters can be rounded up to
+ * match the selected mode.
+ */
+static struct fb_videomode *
+tmiofb_find_mode(struct fb_info *info, struct fb_var_screeninfo *var)
+{
+ struct mfd_cell *cell =
+ info->device->platform_data;
+ struct tmio_fb_data *data = cell->driver_data;
+ struct fb_videomode *best = NULL;
+ int i;
+
+ for (i = 0; i < data->num_modes; i++) {
+ struct fb_videomode *mode = data->modes + i;
+
+ if (mode->xres >= var->xres && mode->yres >= var->yres
+ && (!best || (mode->xres < best->xres
+ && mode->yres < best->yres)))
+ best = mode;
+ }
+
+ return best;
+}
+
+static int tmiofb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+
+ struct fb_videomode *mode;
+ struct mfd_cell *cell =
+ info->device->platform_data;
+ struct tmio_fb_data *data = cell->driver_data;
+
+ mode = tmiofb_find_mode(info, var);
+ if (!mode || var->bits_per_pixel > 16)
+ return -EINVAL;
+
+ fb_videomode_to_var(var, mode);
+
+ var->xres_virtual = mode->xres;
+ var->yres_virtual = info->screen_size / (mode->xres * 2);
+
+ if (var->yres_virtual < var->yres)
+ return -EINVAL;
+
+ var->xoffset = 0;
+ var->yoffset = 0;
+ var->bits_per_pixel = 16;
+ var->grayscale = 0;
+ var->red.offset = 11;
+ var->red.length = 5;
+ var->green.offset = 5;
+ var->green.length = 6;
+ var->blue.offset = 0;
+ var->blue.length = 5;
+ var->transp.offset = 0;
+ var->transp.length = 0;
+ var->nonstd = 0;
+ var->height = data->height; /* mm */
+ var->width = data->width; /* mm */
+ var->rotate = 0;
+ return 0;
+}
+
+static int tmiofb_set_par(struct fb_info *info)
+{
+ struct fb_var_screeninfo *var = &info->var;
+ struct fb_videomode *mode;
+
+ mode = tmiofb_find_mode(info, var);
+ if (!mode)
+ return -EINVAL;
+
+ info->mode = mode;
+ info->fix.line_length = info->mode->xres *
+ var->bits_per_pixel / 8;
+
+ tmiofb_hw_mode(to_platform_device(info->device));
+ tmiofb_clearscreen(info);
+ return 0;
+}
+
+static int tmiofb_setcolreg(unsigned regno, unsigned red, unsigned green,
+ unsigned blue, unsigned transp,
+ struct fb_info *info)
+{
+ struct tmiofb_par *par = info->par;
+
+ if (regno < ARRAY_SIZE(par->pseudo_palette)) {
+ par->pseudo_palette[regno] =
+ ((red & 0xf800)) |
+ ((green & 0xfc00) >> 5) |
+ ((blue & 0xf800) >> 11);
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static int tmiofb_blank(int blank, struct fb_info *info)
+{
+ /*
+ * everything is done in lcd/bl drivers.
+ * this is purely to make sysfs happy and work.
+ */
+ return 0;
+}
+
+static struct fb_ops tmiofb_ops = {
+ .owner = THIS_MODULE,
+
+ .fb_ioctl = tmiofb_ioctl,
+ .fb_check_var = tmiofb_check_var,
+ .fb_set_par = tmiofb_set_par,
+ .fb_setcolreg = tmiofb_setcolreg,
+ .fb_blank = tmiofb_blank,
+ .fb_imageblit = cfb_imageblit,
+#ifdef CONFIG_FB_TMIO_ACCELL
+ .fb_sync = tmiofb_sync,
+ .fb_fillrect = tmiofb_fillrect,
+ .fb_copyarea = tmiofb_copyarea,
+#else
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+#endif
+};
+
+/*--------------------------------------------------------------------------*/
+
+static int __devinit tmiofb_probe(struct platform_device *dev)
+{
+ struct mfd_cell *cell = dev->dev.platform_data;
+ struct tmio_fb_data *data = cell->driver_data;
+ struct resource *ccr = platform_get_resource(dev, IORESOURCE_MEM, 1);
+ struct resource *lcr = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ struct resource *vram = platform_get_resource(dev, IORESOURCE_MEM, 2);
+ int irq = platform_get_irq(dev, 0);
+ struct fb_info *info;
+ struct tmiofb_par *par;
+ int retval;
+
+ /*
+ * This is the only way ATM to disable the fb
+ */
+ if (data == NULL) {
+ dev_err(&dev->dev, "NULL platform data!\n");
+ return -EINVAL;
+ }
+
+ info = framebuffer_alloc(sizeof(struct tmiofb_par), &dev->dev);
+
+ if (!info)
+ return -ENOMEM;
+
+ par = info->par;
+
+#ifdef CONFIG_FB_TMIO_ACCELL
+ init_waitqueue_head(&par->wait_acc);
+
+ par->use_polling = true;
+
+ info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA
+ | FBINFO_HWACCEL_FILLRECT;
+#else
+ info->flags = FBINFO_DEFAULT;
+#endif
+
+ info->fbops = &tmiofb_ops;
+
+ strcpy(info->fix.id, "tmio-fb");
+ info->fix.smem_start = vram->start;
+ info->fix.smem_len = resource_size(vram);
+ info->fix.type = FB_TYPE_PACKED_PIXELS;
+ info->fix.visual = FB_VISUAL_TRUECOLOR;
+ info->fix.mmio_start = lcr->start;
+ info->fix.mmio_len = resource_size(lcr);
+ info->fix.accel = FB_ACCEL_NONE;
+ info->screen_size = info->fix.smem_len - (4 * TMIOFB_FIFO_SIZE);
+ info->pseudo_palette = par->pseudo_palette;
+
+ par->ccr = ioremap(ccr->start, resource_size(ccr));
+ if (!par->ccr) {
+ retval = -ENOMEM;
+ goto err_ioremap_ccr;
+ }
+
+ par->lcr = ioremap(info->fix.mmio_start, info->fix.mmio_len);
+ if (!par->lcr) {
+ retval = -ENOMEM;
+ goto err_ioremap_lcr;
+ }
+
+ info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
+ if (!info->screen_base) {
+ retval = -ENOMEM;
+ goto err_ioremap_vram;
+ }
+
+ retval = request_irq(irq, &tmiofb_irq, IRQF_DISABLED,
+ dev->dev.bus_id, info);
+
+ if (retval)
+ goto err_request_irq;
+
+ platform_set_drvdata(dev, info);
+
+ retval = fb_find_mode(&info->var, info, mode_option,
+ data->modes, data->num_modes,
+ data->modes, 16);
+ if (!retval) {
+ retval = -EINVAL;
+ goto err_find_mode;
+ }
+
+ if (cell->enable) {
+ retval = cell->enable(dev);
+ if (retval)
+ goto err_enable;
+ }
+
+ retval = tmiofb_hw_init(dev);
+ if (retval)
+ goto err_hw_init;
+
+ fb_videomode_to_modelist(data->modes, data->num_modes,
+ &info->modelist);
+
+ retval = register_framebuffer(info);
+ if (retval < 0)
+ goto err_register_framebuffer;
+
+ printk(KERN_INFO "fb%d: %s frame buffer device\n",
+ info->node, info->fix.id);
+
+ return 0;
+
+err_register_framebuffer:
+/*err_set_par:*/
+ tmiofb_hw_stop(dev);
+err_hw_init:
+ if (cell->disable)
+ cell->disable(dev);
+err_enable:
+err_find_mode:
+ platform_set_drvdata(dev, NULL);
+ free_irq(irq, info);
+err_request_irq:
+ iounmap(info->screen_base);
+err_ioremap_vram:
+ iounmap(par->lcr);
+err_ioremap_lcr:
+ iounmap(par->ccr);
+err_ioremap_ccr:
+ framebuffer_release(info);
+ return retval;
+}
+
+static int __devexit tmiofb_remove(struct platform_device *dev)
+{
+ struct mfd_cell *cell = dev->dev.platform_data;
+ struct fb_info *info = platform_get_drvdata(dev);
+ int irq = platform_get_irq(dev, 0);
+ struct tmiofb_par *par;
+
+ if (info) {
+ par = info->par;
+ unregister_framebuffer(info);
+
+ tmiofb_hw_stop(dev);
+
+ if (cell->disable)
+ cell->disable(dev);
+
+ platform_set_drvdata(dev, NULL);
+
+ free_irq(irq, info);
+
+ iounmap(info->screen_base);
+ iounmap(par->lcr);
+ iounmap(par->ccr);
+
+ framebuffer_release(info);
+ }
+
+ return 0;
+}
+
+#ifdef DEBUG
+static void tmiofb_dump_regs(struct platform_device *dev)
+{
+ struct fb_info *info = platform_get_drvdata(dev);
+ struct tmiofb_par *par = info->par;
+
+ printk(KERN_DEBUG "lhccr:\n");
+#define CCR_PR(n) printk(KERN_DEBUG "\t" #n " = \t%04x\n",\
+ tmio_ioread16(par->ccr + CCR_ ## n));
+ CCR_PR(CMD);
+ CCR_PR(REVID);
+ CCR_PR(BASEL);
+ CCR_PR(BASEH);
+ CCR_PR(UGCC);
+ CCR_PR(GCC);
+ CCR_PR(USC);
+ CCR_PR(VRAMRTC);
+ CCR_PR(VRAMSAC);
+ CCR_PR(VRAMBC);
+#undef CCR_PR
+
+ printk(KERN_DEBUG "lcr: \n");
+#define LCR_PR(n) printk(KERN_DEBUG "\t" #n " = \t%04x\n",\
+ tmio_ioread16(par->lcr + LCR_ ## n));
+ LCR_PR(UIS);
+ LCR_PR(VHPN);
+ LCR_PR(CFSAL);
+ LCR_PR(CFSAH);
+ LCR_PR(CFS);
+ LCR_PR(CFWS);
+ LCR_PR(BBIE);
+ LCR_PR(BBISC);
+ LCR_PR(CCS);
+ LCR_PR(BBES);
+ LCR_PR(CMDL);
+ LCR_PR(CMDH);
+ LCR_PR(CFC);
+ LCR_PR(CCIFC);
+ LCR_PR(HWT);
+ LCR_PR(LCDCCRC);
+ LCR_PR(LCDCC);
+ LCR_PR(LCDCOPC);
+ LCR_PR(LCDIS);
+ LCR_PR(LCDIM);
+ LCR_PR(LCDIE);
+ LCR_PR(GDSAL);
+ LCR_PR(GDSAH);
+ LCR_PR(VHPCL);
+ LCR_PR(VHPCH);
+ LCR_PR(GM);
+ LCR_PR(HT);
+ LCR_PR(HDS);
+ LCR_PR(HSS);
+ LCR_PR(HSE);
+ LCR_PR(HNP);
+ LCR_PR(VT);
+ LCR_PR(VDS);
+ LCR_PR(VSS);
+ LCR_PR(VSE);
+ LCR_PR(CDLN);
+ LCR_PR(ILN);
+ LCR_PR(SP);
+ LCR_PR(MISC);
+ LCR_PR(VIHSS);
+ LCR_PR(VIVS);
+ LCR_PR(VIVE);
+ LCR_PR(VIVSS);
+ LCR_PR(VCCIS);
+ LCR_PR(VIDWSAL);
+ LCR_PR(VIDWSAH);
+ LCR_PR(VIDRSAL);
+ LCR_PR(VIDRSAH);
+ LCR_PR(VIPDDST);
+ LCR_PR(VIPDDET);
+ LCR_PR(VIE);
+ LCR_PR(VCS);
+ LCR_PR(VPHWC);
+ LCR_PR(VPHS);
+ LCR_PR(VPVWC);
+ LCR_PR(VPVS);
+ LCR_PR(PLHPIX);
+ LCR_PR(XS);
+ LCR_PR(XCKHW);
+ LCR_PR(STHS);
+ LCR_PR(VT2);
+ LCR_PR(YCKSW);
+ LCR_PR(YSTS);
+ LCR_PR(PPOLS);
+ LCR_PR(PRECW);
+ LCR_PR(VCLKHW);
+ LCR_PR(OC);
+#undef LCR_PR
+}
+#endif
+
+#ifdef CONFIG_PM
+static int tmiofb_suspend(struct platform_device *dev, pm_message_t state)
+{
+ struct fb_info *info = platform_get_drvdata(dev);
+ struct tmiofb_par *par = info->par;
+ struct mfd_cell *cell = dev->dev.platform_data;
+ int retval = 0;
+
+ acquire_console_sem();
+
+ fb_set_suspend(info, 1);
+
+ if (info->fbops->fb_sync)
+ info->fbops->fb_sync(info);
+
+
+ /*
+ * The fb should be usable even if interrupts are disabled (and they are
+ * during suspend/resume). Switch temporary to forced polling.
+ */
+ printk(KERN_INFO "tmiofb: switching to polling\n");
+ par->use_polling = true;
+ tmiofb_hw_stop(dev);
+
+ if (cell->suspend)
+ retval = cell->suspend(dev);
+
+ release_console_sem();
+
+ return retval;
+}
+
+static int tmiofb_resume(struct platform_device *dev)
+{
+ struct fb_info *info = platform_get_drvdata(dev);
+ struct mfd_cell *cell = dev->dev.platform_data;
+ int retval;
+
+ acquire_console_sem();
+
+ if (cell->resume) {
+ retval = cell->resume(dev);
+ if (retval)
+ goto out;
+ }
+
+ tmiofb_irq(-1, info);
+
+ tmiofb_hw_init(dev);
+
+ tmiofb_hw_mode(dev);
+
+ fb_set_suspend(info, 0);
+out:
+ release_console_sem();
+ return retval;
+}
+#else
+#define tmiofb_suspend NULL
+#define tmiofb_resume NULL
+#endif
+
+static struct platform_driver tmiofb_driver = {
+ .driver.name = "tmio-fb",
+ .driver.owner = THIS_MODULE,
+ .probe = tmiofb_probe,
+ .remove = __devexit_p(tmiofb_remove),
+ .suspend = tmiofb_suspend,
+ .resume = tmiofb_resume,
+};
+
+/*--------------------------------------------------------------------------*/
+
+#ifndef MODULE
+static void __init tmiofb_setup(char *options)
+{
+ char *this_opt;
+
+ if (!options || !*options)
+ return;
+
+ while ((this_opt = strsep(&options, ",")) != NULL) {
+ if (!*this_opt)
+ continue;
+ /*
+ * FIXME
+ */
+ }
+}
+#endif
+
+static int __init tmiofb_init(void)
+{
+#ifndef MODULE
+ char *option = NULL;
+
+ if (fb_get_options("tmiofb", &option))
+ return -ENODEV;
+ tmiofb_setup(option);
+#endif
+ return platform_driver_register(&tmiofb_driver);
+}
+
+static void __exit tmiofb_cleanup(void)
+{
+ platform_driver_unregister(&tmiofb_driver);
+}
+
+module_init(tmiofb_init);
+module_exit(tmiofb_cleanup);
+
+MODULE_DESCRIPTION("TMIO framebuffer driver");
+MODULE_AUTHOR("Chris Humbert, Dirk Opfer, Dmitry Baryshkov");
+MODULE_LICENSE("GPL");