85xx: socrates: Enable Lime support.

This patch adds Lime GDC support together with support for the PWM
backlight control through the w83782d chip.  The reset pin of the
latter is attached to GPIO, so we need to reset it in
early_board_init_r.

Signed-off-by: Anatolij Gustschin <agust@denx.de>

4 files changed, 233 insertions, 2 deletions

diff --git a/board/socrates/law.c b/board/socrates/law.c
index 35c4a90..89b446f 100644
--- a/board/socrates/law.c
+++ b/board/socrates/law.c
@@ -36,6 +36,7 @@
  * 0x0000_0000	   0x2fff_ffff	   DDR			   512M
  * 0x8000_0000	   0x9fff_ffff	   PCI1 MEM		   512M
  * 0xc000_0000	   0xc00f_ffff	   FPGA			   1M
+ * 0xc800_0000	   0xcbff_ffff	   LIME			   64M
  * 0xe000_0000	   0xe00f_ffff	   CCSR			   1M (mapped by CCSRBAR)
  * 0xe200_0000	   0xe2ff_ffff	   PCI1 IO		   16M
  * 0xfc00_0000	   0xffff_ffff	   FLASH		   64M
@@ -48,11 +49,12 @@
 struct law_entry law_table[] = {
 	SET_LAW(CFG_DDR_SDRAM_BASE, LAW_SIZE_512M, LAW_TRGT_IF_DDR),
 	SET_LAW(CFG_PCI1_MEM_PHYS, LAW_SIZE_512M, LAW_TRGT_IF_PCI),
-	SET_LAW(CFG_LBC_FLASH_BASE, LAW_SIZE_128M, LAW_TRGT_IF_LBC),
+	SET_LAW(CFG_LBC_FLASH_BASE, LAW_SIZE_64M, LAW_TRGT_IF_LBC),
 	SET_LAW(CFG_PCI1_IO_PHYS, LAW_SIZE_16M, LAW_TRGT_IF_PCI),
 #if defined(CFG_FPGA_BASE)
 	SET_LAW(CFG_FPGA_BASE, LAWAR_SIZE_1M, LAW_TRGT_IF_LBC),
 #endif
+	SET_LAW(CFG_LIME_BASE, LAWAR_SIZE_64M, LAW_TRGT_IF_LBC),
 };
 
 int num_law_entries = ARRAY_SIZE(law_table);
diff --git a/board/socrates/socrates.c b/board/socrates/socrates.c
index 63694a7..73a2d9d 100644
--- a/board/socrates/socrates.c
+++ b/board/socrates/socrates.c
@@ -173,6 +173,12 @@ void local_bus_init (void)
 	/* Init UPMA for FPGA access */
 	out_be32 (&lbc->mamr, 0x44440); /* Use a customer-supplied value */
 	upmconfig (UPMA, (uint *)UPMTableA, sizeof(UPMTableA)/sizeof(int));
+
+	if (getenv("lime")) {
+		/* Init UPMB for Lime controller access */
+		out_be32 (&lbc->mbmr, 0x444440); /* Use a customer-supplied value */
+		upmconfig (UPMB, (uint *)UPMTableB, sizeof(UPMTableB)/sizeof(int));
+	}
 }
 
 #if defined(CONFIG_PCI)
@@ -239,6 +245,14 @@ ft_board_setup(void *blob, bd_t *bd)
 	val[i++] = gd->bd->bi_flashstart;
 	val[i++] = gd->bd->bi_flashsize;
 
+	if (getenv("lime")) {
+		/* Fixup LIME mapping */
+		val[i++] = 2;			/* chip select number */
+		val[i++] = 0;			/* always 0 */
+		val[i++] = CFG_LIME_BASE;
+		val[i++] = CFG_LIME_SIZE;
+	}
+
 	/* Fixup FPGA mapping */
 	val[i++] = 3;				/* chip select number */
 	val[i++] = 0;				/* always 0 */
@@ -252,3 +266,187 @@ ft_board_setup(void *blob, bd_t *bd)
 		       fdt_strerror(rc));
 }
 #endif /* defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP) */
+
+#include <i2c.h>
+#include <mb862xx.h>
+#include <video_fb.h>
+
+#define CFG_LIME_SRST		((CFG_LIME_BASE) + 0x01FC002C)
+#define CFG_LIME_CCF		((CFG_LIME_BASE) + 0x01FC0038)
+#define CFG_LIME_MMR		((CFG_LIME_BASE) + 0x01FCFFFC)
+/* Lime clock frequency */
+#define CFG_LIME_CLK_100MHZ	0x00000
+#define CFG_LIME_CLK_133MHZ	0x10000
+/* SDRAM parameter */
+#define CFG_LIME_MMR_VALUE	0x4157BA63
+
+#define DISPLAY_WIDTH		800
+#define DISPLAY_HEIGHT		480
+#define DEFAULT_BRIGHTNESS	25
+#define BACKLIGHT_ENABLE	(1 << 31)
+
+extern GraphicDevice mb862xx;
+
+static const gdc_regs init_regs [] =
+{
+	{0x0100, 0x00010f00},
+	{0x0020, 0x801901df},
+	{0x0024, 0x00000000},
+	{0x0028, 0x00000000},
+	{0x002c, 0x00000000},
+	{0x0110, 0x00000000},
+	{0x0114, 0x00000000},
+	{0x0118, 0x01df0320},
+	{0x0004, 0x041f0000},
+	{0x0008, 0x031f031f},
+	{0x000c, 0x017f0349},
+	{0x0010, 0x020c0000},
+	{0x0014, 0x01df01e9},
+	{0x0018, 0x00000000},
+	{0x001c, 0x01e00320},
+	{0x0100, 0x80010f00},
+	{0x0, 0x0}
+};
+
+const gdc_regs *board_get_regs (void)
+{
+	return init_regs;
+}
+
+/* Returns Lime base address */
+unsigned int board_video_init (void)
+{
+
+	if (!getenv("lime"))
+		return 0;
+
+	/*
+	 * Reset Lime controller
+	 */
+	out_be32((void *)CFG_LIME_SRST, 0x1);
+	udelay(200);
+
+	/* Set Lime clock to 133MHz */
+	out_be32((void *)CFG_LIME_CCF, CFG_LIME_CLK_133MHZ);
+	/* Delay required */
+	udelay(300);
+	/* Set memory parameters */
+	out_be32((void *)CFG_LIME_MMR, CFG_LIME_MMR_VALUE);
+
+	mb862xx.winSizeX = DISPLAY_WIDTH;
+	mb862xx.winSizeY = DISPLAY_HEIGHT;
+	mb862xx.gdfIndex = GDF_15BIT_555RGB;
+	mb862xx.gdfBytesPP = 2;
+
+	return CFG_LIME_BASE;
+}
+
+#define W83782D_REG_CFG		0x40
+#define W83782D_REG_BANK_SEL	0x4e
+#define W83782D_REG_ADCCLK	0x4b
+#define W83782D_REG_BEEP_CTRL	0x4d
+#define W83782D_REG_BEEP_CTRL2	0x57
+#define W83782D_REG_PWMOUT1	0x5b
+#define W83782D_REG_VBAT	0x5d
+
+static int w83782d_hwmon_init(void)
+{
+	u8 buf;
+
+	if (i2c_read(CFG_I2C_W83782G_ADDR, W83782D_REG_CFG, 1, &buf, 1))
+		return -1;
+
+	i2c_reg_write(CFG_I2C_W83782G_ADDR, W83782D_REG_CFG, 0x80);
+	i2c_reg_write(CFG_I2C_W83782G_ADDR, W83782D_REG_BANK_SEL, 0);
+	i2c_reg_write(CFG_I2C_W83782G_ADDR, W83782D_REG_ADCCLK, 0x40);
+
+	buf = i2c_reg_read(CFG_I2C_W83782G_ADDR, W83782D_REG_BEEP_CTRL);
+	i2c_reg_write(CFG_I2C_W83782G_ADDR, W83782D_REG_BEEP_CTRL,
+		      buf | 0x80);
+	i2c_reg_write(CFG_I2C_W83782G_ADDR, W83782D_REG_BEEP_CTRL2, 0);
+	i2c_reg_write(CFG_I2C_W83782G_ADDR, W83782D_REG_PWMOUT1, 0x47);
+	i2c_reg_write(CFG_I2C_W83782G_ADDR, W83782D_REG_VBAT, 0x01);
+
+	buf = i2c_reg_read(CFG_I2C_W83782G_ADDR, W83782D_REG_CFG);
+	i2c_reg_write(CFG_I2C_W83782G_ADDR, W83782D_REG_CFG,
+		      (buf & 0xf4) | 0x01);
+	return 0;
+}
+
+static void board_backlight_brightness(int br)
+{
+	u32 reg;
+	u8 buf;
+	u8 old_buf;
+
+	/* Select bank 0 */
+	if (i2c_read(CFG_I2C_W83782G_ADDR, 0x4e, 1, &old_buf, 1))
+		goto err;
+	else
+		buf = old_buf & 0xf8;
+
+	if (i2c_write(CFG_I2C_W83782G_ADDR, 0x4e, 1, &buf, 1))
+		goto err;
+
+	if (br > 0) {
+		/* PWMOUT1 duty cycle ctrl */
+		buf = 255 / (100 / br);
+		if (i2c_write(CFG_I2C_W83782G_ADDR, 0x5b, 1, &buf, 1))
+			goto err;
+
+		/* LEDs on */
+		reg = in_be32((void *)(CFG_FPGA_BASE + 0x0c));
+		if (!(reg & BACKLIGHT_ENABLE));
+			out_be32((void *)(CFG_FPGA_BASE + 0x0c),
+				 reg | BACKLIGHT_ENABLE);
+	} else {
+		buf = 0;
+		if (i2c_write(CFG_I2C_W83782G_ADDR, 0x5b, 1, &buf, 1))
+			goto err;
+
+		/* LEDs off */
+		reg = in_be32((void *)(CFG_FPGA_BASE + 0x0c));
+		reg &= ~BACKLIGHT_ENABLE;
+		out_be32((void *)(CFG_FPGA_BASE + 0x0c), reg);
+	}
+	/* Restore previous bank setting */
+	if (i2c_write(CFG_I2C_W83782G_ADDR, 0x4e, 1, &old_buf, 1))
+		goto err;
+
+	return;
+err:
+	printf("W83782G I2C access failed\n");
+}
+
+void board_backlight_switch (int flag)
+{
+	char * param;
+	int rc;
+
+	if (w83782d_hwmon_init())
+		printf ("hwmon IC init failed\n");
+
+	if (flag) {
+		param = getenv("brightness");
+		rc = param ? simple_strtol(param, NULL, 10) : -1;
+		if (rc < 0)
+			rc = DEFAULT_BRIGHTNESS;
+	} else {
+		rc = 0;
+	}
+	board_backlight_brightness(rc);
+}
+
+#if defined(CONFIG_CONSOLE_EXTRA_INFO)
+/*
+ * Return text to be printed besides the logo.
+ */
+void video_get_info_str (int line_number, char *info)
+{
+	if (line_number == 1) {
+		strcpy (info, " Board: Socrates");
+	} else {
+		info [0] = '\0';
+	}
+}
+#endif
diff --git a/board/socrates/tlb.c b/board/socrates/tlb.c
index aea99ad..d255cea 100644
--- a/board/socrates/tlb.c
+++ b/board/socrates/tlb.c
@@ -46,7 +46,7 @@ struct fsl_e_tlb_entry tlb_table[] = {
 
 
 	/*
-	 * TLB 0:	64M	Non-cacheable, guarded
+	 * TLB 1:	64M	Non-cacheable, guarded
 	 * 0xfc000000	64M	FLASH
 	 * Out of reset this entry is only 4K.
 	 */
@@ -81,6 +81,17 @@ struct fsl_e_tlb_entry tlb_table[] = {
 #endif
 
 	/*
+	 * TLB 5:	64M	Non-cacheable, guarded
+	 * 0xc8000000	16M	LIME GDC framebuffer
+	 * 0xc9fc0000	256K	LIME GDC MMIO
+	 * (0xcbfc0000	256K	LIME GDC MMIO)
+	 * MMIO is relocatable and could be at 0xcbfc0000
+	 */
+	SET_TLB_ENTRY(1, CFG_LIME_BASE, CFG_LIME_BASE,
+		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
+		      0, 5, BOOKE_PAGESZ_64M, 1),
+
+	/*
 	 * TLB 6:	64M	Non-cacheable, guarded
 	 * 0xe000_0000	1M	CCSRBAR
 	 * 0xe200_0000	16M	PCI1 IO
diff --git a/board/socrates/upm_table.h b/board/socrates/upm_table.h
index ed8f887..2a89c96 100644
--- a/board/socrates/upm_table.h
+++ b/board/socrates/upm_table.h
@@ -52,4 +52,24 @@ static const unsigned int UPMTableA[] =
 	0xffffec00,  0xffffec00,  0xffffec00,  0xffffec01  /* Words 60 to 63	*/
 };
 
+/* LIME UPM B Table Configuration Code */
+static unsigned int UPMTableB[] =
+{
+	0x0ffefc00,  0x0ffcfc00,  0x0ffcfc00,  0x0ffcfc00, /* Words 0 to 3	*/
+	0x0ffcfc00,  0x0ffcfc00,  0x0ffcfc04,  0x0ffffc01, /* Words 4 to 7	*/
+	0x0ffefc00,  0x0ffcfc00,  0x0ffcfc00,  0x0ffcfc00, /* Words 8 to 11	*/
+	0x0ffcfc00,  0x0ffcfc00,  0x0ffcfc04,  0x0ffcfc04, /* Words 12 to 15	*/
+	0x0ffcfc04,  0x0ffcfc04,  0x0ffcfc04,  0x0ffcfc04, /* Words 16 to 19	*/
+	0x0ffcfc04,  0x0ffcfc04,  0x0ffffc00,  0xfffffc01, /* Words 20 to 23	*/
+	0x0cfffc00,  0x00fffc00,  0x00fffc00,  0x00fffc00, /* Words 24 to 27	*/
+	0x00fffc00,  0x00fffc00,  0x00fffc04,  0x0ffffc01, /* Words 28 to 31	*/
+	0x0cfffc00,  0x00fffc00,  0x00fffc00,  0x00fffc00, /* Words 32 to 35	*/
+	0x00fffc00,  0x00fffc00,  0x00fffc04,  0x00fffc04, /* Words 36 to 39	*/
+	0x00fffc04,  0x00fffc04,  0x00fffc04,  0x00fffc04, /* Words 40 to 43	*/
+	0x00fffc04,  0x00fffc04,  0x0ffffc00,  0xfffffc01, /* Words 44 to 47	*/
+	0xfffffc00,  0xfffffc00,  0xfffffc00,  0xfffffc00, /* Words 48 to 51	*/
+	0xfffffc00,  0xfffffc00,  0xfffffc00,  0xfffffc00, /* Words 52 to 55	*/
+	0xfffffc00,  0xfffffc00,  0xfffffc00,  0xfffffc01, /* Words 56 to 59	*/
+	0xfffffc00,  0xfffffc00,  0xfffffc00,  0xfffffc01  /* Words 60 to 63	*/
+};
 #endif