#include <linux/clk.h>
#include <linux/err.h>
#include <linux/completion.h>
+#include <linux/kthread.h>
+#include <linux/freezer.h>
#include <asm/hardware.h>
#include <asm/io.h>
unsigned long off = vma->vm_pgoff << PAGE_SHIFT;
if (off < info->fix.smem_len) {
- vma->vm_pgoff += 1;
+ vma->vm_pgoff += fbi->video_offset / PAGE_SIZE;
return dma_mmap_writecombine(fbi->dev, vma, fbi->map_cpu,
fbi->map_dma, fbi->map_size);
}
return 0;
}
+#ifdef CONFIG_FB_PXA_SMARTPANEL
+static int setup_smart_dma(struct pxafb_info *fbi)
+{
+ struct pxafb_dma_descriptor *dma_desc;
+ unsigned long dma_desc_off, cmd_buff_off;
+
+ dma_desc = &fbi->dma_buff->dma_desc[DMA_CMD];
+ dma_desc_off = offsetof(struct pxafb_dma_buff, dma_desc[DMA_CMD]);
+ cmd_buff_off = offsetof(struct pxafb_dma_buff, cmd_buff);
+
+ dma_desc->fdadr = fbi->dma_buff_phys + dma_desc_off;
+ dma_desc->fsadr = fbi->dma_buff_phys + cmd_buff_off;
+ dma_desc->fidr = 0;
+ dma_desc->ldcmd = fbi->n_smart_cmds * sizeof(uint16_t);
+
+ fbi->fdadr[DMA_CMD] = dma_desc->fdadr;
+ return 0;
+}
+
+int pxafb_smart_flush(struct fb_info *info)
+{
+ struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb);
+ uint32_t prsr;
+ int ret = 0;
+
+ /* disable controller until all registers are set up */
+ lcd_writel(fbi, LCCR0, fbi->reg_lccr0 & ~LCCR0_ENB);
+
+ /* 1. make it an even number of commands to align on 32-bit boundary
+ * 2. add the interrupt command to the end of the chain so we can
+ * keep track of the end of the transfer
+ */
+
+ while (fbi->n_smart_cmds & 1)
+ fbi->smart_cmds[fbi->n_smart_cmds++] = SMART_CMD_NOOP;
+
+ fbi->smart_cmds[fbi->n_smart_cmds++] = SMART_CMD_INTERRUPT;
+ fbi->smart_cmds[fbi->n_smart_cmds++] = SMART_CMD_WAIT_FOR_VSYNC;
+ setup_smart_dma(fbi);
+
+ /* continue to execute next command */
+ prsr = lcd_readl(fbi, PRSR) | PRSR_ST_OK | PRSR_CON_NT;
+ lcd_writel(fbi, PRSR, prsr);
+
+ /* stop the processor in case it executed "wait for sync" cmd */
+ lcd_writel(fbi, CMDCR, 0x0001);
+
+ /* don't send interrupts for fifo underruns on channel 6 */
+ lcd_writel(fbi, LCCR5, LCCR5_IUM(6));
+
+ lcd_writel(fbi, LCCR1, fbi->reg_lccr1);
+ lcd_writel(fbi, LCCR2, fbi->reg_lccr2);
+ lcd_writel(fbi, LCCR3, fbi->reg_lccr3);
+ lcd_writel(fbi, FDADR0, fbi->fdadr[0]);
+ lcd_writel(fbi, FDADR6, fbi->fdadr[6]);
+
+ /* begin sending */
+ lcd_writel(fbi, LCCR0, fbi->reg_lccr0 | LCCR0_ENB);
+
+ if (wait_for_completion_timeout(&fbi->command_done, HZ/2) == 0) {
+ pr_warning("%s: timeout waiting for command done\n",
+ __func__);
+ ret = -ETIMEDOUT;
+ }
+
+ /* quick disable */
+ prsr = lcd_readl(fbi, PRSR) & ~(PRSR_ST_OK | PRSR_CON_NT);
+ lcd_writel(fbi, PRSR, prsr);
+ lcd_writel(fbi, LCCR0, fbi->reg_lccr0 & ~LCCR0_ENB);
+ lcd_writel(fbi, FDADR6, 0);
+ fbi->n_smart_cmds = 0;
+ return ret;
+}
+
+int pxafb_smart_queue(struct fb_info *info, uint16_t *cmds, int n_cmds)
+{
+ int i;
+ struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb);
+
+ /* leave 2 commands for INTERRUPT and WAIT_FOR_SYNC */
+ for (i = 0; i < n_cmds; i++) {
+ if (fbi->n_smart_cmds == CMD_BUFF_SIZE - 8)
+ pxafb_smart_flush(info);
+
+ fbi->smart_cmds[fbi->n_smart_cmds++] = *cmds++;
+ }
+
+ return 0;
+}
+
+static unsigned int __smart_timing(unsigned time_ns, unsigned long lcd_clk)
+{
+ unsigned int t = (time_ns * (lcd_clk / 1000000) / 1000);
+ return (t == 0) ? 1 : t;
+}
+
+static void setup_smart_timing(struct pxafb_info *fbi,
+ struct fb_var_screeninfo *var)
+{
+ struct pxafb_mach_info *inf = fbi->dev->platform_data;
+ struct pxafb_mode_info *mode = &inf->modes[0];
+ unsigned long lclk = clk_get_rate(fbi->clk);
+ unsigned t1, t2, t3, t4;
+
+ t1 = max(mode->a0csrd_set_hld, mode->a0cswr_set_hld);
+ t2 = max(mode->rd_pulse_width, mode->wr_pulse_width);
+ t3 = mode->op_hold_time;
+ t4 = mode->cmd_inh_time;
+
+ fbi->reg_lccr1 =
+ LCCR1_DisWdth(var->xres) |
+ LCCR1_BegLnDel(__smart_timing(t1, lclk)) |
+ LCCR1_EndLnDel(__smart_timing(t2, lclk)) |
+ LCCR1_HorSnchWdth(__smart_timing(t3, lclk));
+
+ fbi->reg_lccr2 = LCCR2_DisHght(var->yres);
+ fbi->reg_lccr3 = LCCR3_PixClkDiv(__smart_timing(t4, lclk));
+
+ /* FIXME: make this configurable */
+ fbi->reg_cmdcr = 1;
+}
+
+static int pxafb_smart_thread(void *arg)
+{
+ struct pxafb_info *fbi = (struct pxafb_info *) arg;
+ struct pxafb_mach_info *inf = fbi->dev->platform_data;
+
+ if (!fbi || !inf->smart_update) {
+ pr_err("%s: not properly initialized, thread terminated\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ pr_debug("%s(): task starting\n", __func__);
+
+ set_freezable();
+ while (!kthread_should_stop()) {
+
+ if (try_to_freeze())
+ continue;
+
+ if (fbi->state == C_ENABLE) {
+ inf->smart_update(&fbi->fb);
+ complete(&fbi->refresh_done);
+ }
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(30 * HZ / 1000);
+ }
+
+ pr_debug("%s(): task ending\n", __func__);
+ return 0;
+}
+
+static int pxafb_smart_init(struct pxafb_info *fbi)
+{
+ fbi->smart_thread = kthread_run(pxafb_smart_thread, fbi,
+ "lcd_refresh");
+ if (IS_ERR(fbi->smart_thread)) {
+ printk(KERN_ERR "%s: unable to create kernel thread\n",
+ __func__);
+ return PTR_ERR(fbi->smart_thread);
+ }
+ return 0;
+}
+#else
+int pxafb_smart_queue(struct fb_info *info, uint16_t *cmds, int n_cmds)
+{
+ return 0;
+}
+
+int pxafb_smart_flush(struct fb_info *info)
+{
+ return 0;
+}
+#endif /* CONFIG_FB_SMART_PANEL */
+
static void setup_parallel_timing(struct pxafb_info *fbi,
struct fb_var_screeninfo *var)
{
size_t nbytes;
#if DEBUG_VAR
- if (var->xres < 16 || var->xres > 1024)
- printk(KERN_ERR "%s: invalid xres %d\n",
- fbi->fb.fix.id, var->xres);
- switch (var->bits_per_pixel) {
- case 1:
- case 2:
- case 4:
- case 8:
- case 16:
- break;
- default:
- printk(KERN_ERR "%s: invalid bit depth %d\n",
- fbi->fb.fix.id, var->bits_per_pixel);
- break;
+ if (!(fbi->lccr0 & LCCR0_LCDT)) {
+ if (var->xres < 16 || var->xres > 1024)
+ printk(KERN_ERR "%s: invalid xres %d\n",
+ fbi->fb.fix.id, var->xres);
+ switch (var->bits_per_pixel) {
+ case 1:
+ case 2:
+ case 4:
+ case 8:
+ case 16:
+ break;
+ default:
+ printk(KERN_ERR "%s: invalid bit depth %d\n",
+ fbi->fb.fix.id, var->bits_per_pixel);
+ break;
+ }
+
+ if (var->hsync_len < 1 || var->hsync_len > 64)
+ printk(KERN_ERR "%s: invalid hsync_len %d\n",
+ fbi->fb.fix.id, var->hsync_len);
+ if (var->left_margin < 1 || var->left_margin > 255)
+ printk(KERN_ERR "%s: invalid left_margin %d\n",
+ fbi->fb.fix.id, var->left_margin);
+ if (var->right_margin < 1 || var->right_margin > 255)
+ printk(KERN_ERR "%s: invalid right_margin %d\n",
+ fbi->fb.fix.id, var->right_margin);
+ if (var->yres < 1 || var->yres > 1024)
+ printk(KERN_ERR "%s: invalid yres %d\n",
+ fbi->fb.fix.id, var->yres);
+ if (var->vsync_len < 1 || var->vsync_len > 64)
+ printk(KERN_ERR "%s: invalid vsync_len %d\n",
+ fbi->fb.fix.id, var->vsync_len);
+ if (var->upper_margin < 0 || var->upper_margin > 255)
+ printk(KERN_ERR "%s: invalid upper_margin %d\n",
+ fbi->fb.fix.id, var->upper_margin);
+ if (var->lower_margin < 0 || var->lower_margin > 255)
+ printk(KERN_ERR "%s: invalid lower_margin %d\n",
+ fbi->fb.fix.id, var->lower_margin);
}
- if (var->hsync_len < 1 || var->hsync_len > 64)
- printk(KERN_ERR "%s: invalid hsync_len %d\n",
- fbi->fb.fix.id, var->hsync_len);
- if (var->left_margin < 1 || var->left_margin > 255)
- printk(KERN_ERR "%s: invalid left_margin %d\n",
- fbi->fb.fix.id, var->left_margin);
- if (var->right_margin < 1 || var->right_margin > 255)
- printk(KERN_ERR "%s: invalid right_margin %d\n",
- fbi->fb.fix.id, var->right_margin);
- if (var->yres < 1 || var->yres > 1024)
- printk(KERN_ERR "%s: invalid yres %d\n",
- fbi->fb.fix.id, var->yres);
- if (var->vsync_len < 1 || var->vsync_len > 64)
- printk(KERN_ERR "%s: invalid vsync_len %d\n",
- fbi->fb.fix.id, var->vsync_len);
- if (var->upper_margin < 0 || var->upper_margin > 255)
- printk(KERN_ERR "%s: invalid upper_margin %d\n",
- fbi->fb.fix.id, var->upper_margin);
- if (var->lower_margin < 0 || var->lower_margin > 255)
- printk(KERN_ERR "%s: invalid lower_margin %d\n",
- fbi->fb.fix.id, var->lower_margin);
#endif
/* Update shadow copy atomically */
local_irq_save(flags);
- setup_parallel_timing(fbi, var);
+#ifdef CONFIG_FB_PXA_SMARTPANEL
+ if (fbi->lccr0 & LCCR0_LCDT)
+ setup_smart_timing(fbi, var);
+ else
+#endif
+ setup_parallel_timing(fbi, var);
fbi->reg_lccr0 = fbi->lccr0 |
(LCCR0_LDM | LCCR0_SFM | LCCR0_IUM | LCCR0_EFM |
setup_frame_dma(fbi, DMA_LOWER, PAL_NONE, nbytes, nbytes);
}
- if (var->bits_per_pixel >= 16)
+ if ((var->bits_per_pixel >= 16) || (fbi->lccr0 & LCCR0_LCDT))
setup_frame_dma(fbi, DMA_BASE, PAL_NONE, 0, nbytes);
else
setup_frame_dma(fbi, DMA_BASE, PAL_BASE, 0, nbytes);
/* enable LCD controller clock */
clk_enable(fbi->clk);
+ if (fbi->lccr0 & LCCR0_LCDT)
+ return;
+
/* Sequence from 11.7.10 */
lcd_writel(fbi, LCCR3, fbi->reg_lccr3);
lcd_writel(fbi, LCCR2, fbi->reg_lccr2);
{
uint32_t lccr0;
+#ifdef CONFIG_FB_PXA_SMARTPANEL
+ if (fbi->lccr0 & LCCR0_LCDT) {
+ wait_for_completion_timeout(&fbi->refresh_done,
+ 200 * HZ / 1000);
+ return;
+ }
+#endif
+
/* Clear LCD Status Register */
lcd_writel(fbi, LCSR, 0xffffffff);
complete(&fbi->disable_done);
}
+#ifdef CONFIG_FB_PXA_SMARTPANEL
+ if (lcsr & LCSR_CMD_INT)
+ complete(&fbi->command_done);
+#endif
+
lcd_writel(fbi, LCSR, lcsr);
return IRQ_HANDLED;
}
* We reserve one page for the palette, plus the size
* of the framebuffer.
*/
- fbi->map_size = PAGE_ALIGN(fbi->fb.fix.smem_len + PAGE_SIZE);
+ fbi->video_offset = PAGE_ALIGN(sizeof(struct pxafb_dma_buff));
+ fbi->map_size = PAGE_ALIGN(fbi->fb.fix.smem_len + fbi->video_offset);
fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size,
&fbi->map_dma, GFP_KERNEL);
if (fbi->map_cpu) {
/* prevent initial garbage on screen */
memset(fbi->map_cpu, 0, fbi->map_size);
- fbi->fb.screen_base = fbi->map_cpu + PAGE_SIZE;
- fbi->screen_dma = fbi->map_dma + PAGE_SIZE;
+ fbi->fb.screen_base = fbi->map_cpu + fbi->video_offset;
+ fbi->screen_dma = fbi->map_dma + fbi->video_offset;
+
/*
* FIXME: this is actually the wrong thing to place in
* smem_start. But fbdev suffers from the problem that
fbi->fb.fix.smem_start = fbi->screen_dma;
fbi->palette_size = fbi->fb.var.bits_per_pixel == 8 ? 256 : 16;
- fbi->dma_buff = (void *)fbi->map_cpu;
+ fbi->dma_buff = (void *) fbi->map_cpu;
fbi->dma_buff_phys = fbi->map_dma;
- fbi->palette_cpu = (u16 *)&fbi->dma_buff->palette[0];
+ fbi->palette_cpu = (u16 *) fbi->dma_buff->palette;
+
+#ifdef CONFIG_FB_PXA_SMARTPANEL
+ fbi->smart_cmds = (uint16_t *) fbi->dma_buff->cmd_buff;
+ fbi->n_smart_cmds = 0;
+#endif
}
return fbi->map_cpu ? 0 : -ENOMEM;
INIT_WORK(&fbi->task, pxafb_task);
init_MUTEX(&fbi->ctrlr_sem);
init_completion(&fbi->disable_done);
+#ifdef CONFIG_FB_PXA_SMARTPANEL
+ init_completion(&fbi->command_done);
+ init_completion(&fbi->refresh_done);
+#endif
return fbi;
}
goto failed_free_mem;
}
+#ifdef CONFIG_FB_PXA_SMARTPANEL
+ ret = pxafb_smart_init(fbi);
+ if (ret) {
+ dev_err(&dev->dev, "failed to initialize smartpanel\n");
+ goto failed_free_irq;
+ }
+#endif
/*
* This makes sure that our colour bitfield
* descriptors are correctly initialised.
#define LCCR1 (0x004) /* LCD Controller Control Register 1 */
#define LCCR2 (0x008) /* LCD Controller Control Register 2 */
#define LCCR3 (0x00C) /* LCD Controller Control Register 3 */
-#define LCCR4 (0x010) /* LCD Controller Control Register 3 */
+#define LCCR4 (0x010) /* LCD Controller Control Register 4 */
+#define LCCR5 (0x014) /* LCD Controller Control Register 5 */
#define DFBR0 (0x020) /* DMA Channel 0 Frame Branch Register */
#define DFBR1 (0x024) /* DMA Channel 1 Frame Branch Register */
#define LCSR (0x038) /* LCD Controller Status Register */
#define TMEDRGBR (0x040) /* TMED RGB Seed Register */
#define TMEDCR (0x044) /* TMED Control Register */
+#define CMDCR (0x100) /* Command Control Register */
+#define PRSR (0x104) /* Panel Read Status Register */
+
#define LCCR3_1BPP (0 << 24)
#define LCCR3_2BPP (1 << 24)
#define LCCR3_4BPP (2 << 24)
#define FSADR1 (0x214) /* DMA Channel 1 Frame Source Address Register */
#define FIDR1 (0x218) /* DMA Channel 1 Frame ID Register */
#define LDCMD1 (0x21C) /* DMA Channel 1 Command Register */
+#define FDADR6 (0x260) /* DMA Channel 6 Frame Descriptor Address Register */
+#define FSADR6 (0x264) /* DMA Channel 6 Frame Source Address Register */
+#define FIDR6 (0x268) /* DMA Channel 6 Frame ID Register */
#define LCCR0_ENB (1 << 0) /* LCD Controller enable */
#define LCCR0_CMS (1 << 1) /* Color/Monochrome Display Select */
#define LCCR3_VrtSnchH (LCCR3_VSP*0) /* VSP Active High */
#define LCCR3_VrtSnchL (LCCR3_VSP*1) /* VSP Active Low */
+#define LCCR5_IUM(x) (1 << ((x) + 23)) /* input underrun mask */
+#define LCCR5_BSM(x) (1 << ((x) + 15)) /* branch mask */
+#define LCCR5_EOFM(x) (1 << ((x) + 7)) /* end of frame mask */
+#define LCCR5_SOFM(x) (1 << ((x) + 0)) /* start of frame mask */
+
#define LCSR_LDD (1 << 0) /* LCD Disable Done */
#define LCSR_SOF (1 << 1) /* Start of frame */
#define LCSR_BER (1 << 2) /* Bus error */
#define LCSR_EOF (1 << 8) /* end of frame */
#define LCSR_BS (1 << 9) /* branch status */
#define LCSR_SINT (1 << 10) /* subsequent interrupt */
+#define LCSR_RD_ST (1 << 11) /* read status */
+#define LCSR_CMD_INT (1 << 12) /* command interrupt */
#define LDCMD_PAL (1 << 26) /* instructs DMA to load palette buffer */
+/* smartpanel related */
+#define PRSR_DATA(x) ((x) & 0xff) /* Panel Data */
+#define PRSR_A0 (1 << 8) /* Read Data Source */
+#define PRSR_ST_OK (1 << 9) /* Status OK */
+#define PRSR_CON_NT (1 << 10) /* Continue to Next Command */
+
+#define SMART_CMD_A0 (0x1 << 8)
+#define SMART_CMD_READ_STATUS_REG (0x0 << 9)
+#define SMART_CMD_READ_FRAME_BUFFER ((0x0 << 9) | SMART_CMD_A0)
+#define SMART_CMD_WRITE_COMMAND (0x1 << 9)
+#define SMART_CMD_WRITE_DATA ((0x1 << 9) | SMART_CMD_A0)
+#define SMART_CMD_WRITE_FRAME ((0x2 << 9) | SMART_CMD_A0)
+#define SMART_CMD_WAIT_FOR_VSYNC (0x3 << 9)
+#define SMART_CMD_NOOP (0x4 << 9)
+#define SMART_CMD_INTERRUPT (0x5 << 9)
+
+#define SMART_CMD(x) (SMART_CMD_WRITE_COMMAND | ((x) & 0xff))
+#define SMART_DAT(x) (SMART_CMD_WRITE_DATA | ((x) & 0xff))
#endif /* __ASM_ARCH_REGS_LCD_H */
projects / mirror_ubuntu-eoan-kernel.git / commitdiff