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Subject[RFC] AVR32: Implement platform hooks for atmel_lcdfb driver
Date
This modifies and extends the existing AVR32 lcdc platform code to
support the new atmel_lcdfb driver. The ATSTK1000 board code is set up
to use the on-board Samsung LTV350QV LCD panel.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
---
I'm planning to push this upstream through the AVR32 tree unless
someone finds any problems with the platform interface to the
atmel_lcdfb driver. Posted as a follow-up to show one user of the
driver.
arch/avr32/boards/atstk1000/atstk1000.h | 15 ++++++
arch/avr32/boards/atstk1000/atstk1002.c | 10 ++--
arch/avr32/boards/atstk1000/setup.c | 45 +++++++++++++++++-
arch/avr32/mach-at32ap/at32ap7000.c | 77 ++++++++++++++++++++++++-------
include/asm-avr32/arch-at32ap/board.h | 8 +--
5 files changed, 127 insertions(+), 28 deletions(-)
diff --git a/arch/avr32/boards/atstk1000/atstk1000.h b/arch/avr32/boards/atstk1000/atstk1000.h
new file mode 100644
index 0000000..9a49ed0
--- /dev/null
+++ b/arch/avr32/boards/atstk1000/atstk1000.h
@@ -0,0 +1,15 @@
+/*
+ * ATSTK1000 setup code: Daughterboard interface
+ *
+ * Copyright (C) 2007 Atmel Corporation
+ *
+ * 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.
+ */
+#ifndef __ARCH_AVR32_BOARDS_ATSTK1000_ATSTK1000_H
+#define __ARCH_AVR32_BOARDS_ATSTK1000_ATSTK1000_H
+
+extern struct atmel_lcdfb_info atstk1000_lcdc_data;
+
+#endif /* __ARCH_AVR32_BOARDS_ATSTK1000_ATSTK1000_H */
diff --git a/arch/avr32/boards/atstk1000/atstk1002.c b/arch/avr32/boards/atstk1000/atstk1002.c
index abe6ca2..fe1dbe2 100644
--- a/arch/avr32/boards/atstk1000/atstk1002.c
+++ b/arch/avr32/boards/atstk1000/atstk1002.c
@@ -16,6 +16,8 @@
#include <linux/types.h>
#include <linux/spi/spi.h>

+#include <video/atmel_lcdc.h>
+
#include <asm/io.h>
#include <asm/setup.h>
#include <asm/arch/at32ap7000.h>
@@ -23,6 +25,7 @@
#include <asm/arch/init.h>
#include <asm/arch/portmux.h>

+#include "atstk1000.h"

#define SW2_DEFAULT /* MMCI and UART_A available */

@@ -31,9 +34,7 @@ struct eth_addr {
};

static struct eth_addr __initdata hw_addr[2];
-
static struct eth_platform_data __initdata eth_data[2];
-static struct lcdc_platform_data atstk1000_fb0_data;

static struct spi_board_info spi0_board_info[] __initdata = {
{
@@ -148,9 +149,8 @@ static int __init atstk1002_init(void)
set_hw_addr(at32_add_device_eth(0, &eth_data[0]));

at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
- atstk1000_fb0_data.fbmem_start = fbmem_start;
- atstk1000_fb0_data.fbmem_size = fbmem_size;
- at32_add_device_lcdc(0, &atstk1000_fb0_data);
+ at32_add_device_lcdc(0, &atstk1000_lcdc_data,
+ fbmem_start, fbmem_size);

return 0;
}
diff --git a/arch/avr32/boards/atstk1000/setup.c b/arch/avr32/boards/atstk1000/setup.c
index 2bc4b88..c9af409 100644
--- a/arch/avr32/boards/atstk1000/setup.c
+++ b/arch/avr32/boards/atstk1000/setup.c
@@ -8,13 +8,56 @@
* published by the Free Software Foundation.
*/
#include <linux/bootmem.h>
+#include <linux/fb.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/linkage.h>

-#include <asm/setup.h>
+#include <video/atmel_lcdc.h>

+#include <asm/setup.h>
#include <asm/arch/board.h>

+#include "atstk1000.h"
+
/* Initialized by bootloader-specific startup code. */
struct tag *bootloader_tags __initdata;
+
+static struct fb_videomode __initdata ltv350qv_modes[] = {
+ {
+ .name = "320x240 @ 75",
+ .refresh = 75,
+ .xres = 320, .yres = 240,
+ .pixclock = KHZ2PICOS(6891),
+
+ .left_margin = 17, .right_margin = 33,
+ .upper_margin = 10, .lower_margin = 10,
+ .hsync_len = 16, .vsync_len = 1,
+
+ .sync = 0,
+ .vmode = FB_VMODE_NONINTERLACED,
+ },
+};
+
+static struct fb_monspecs __initdata atstk1000_default_monspecs = {
+ .manufacturer = "SNG",
+ .monitor = "LTV350QV",
+ .modedb = ltv350qv_modes,
+ .modedb_len = ARRAY_SIZE(ltv350qv_modes),
+ .hfmin = 14820,
+ .hfmax = 22230,
+ .vfmin = 60,
+ .vfmax = 90,
+ .dclkmax = 30000000,
+};
+
+struct atmel_lcdfb_info __initdata atstk1000_lcdc_data = {
+ .default_bpp = 24,
+ .default_dmacon = ATMEL_LCDC_DMAEN | ATMEL_LCDC_DMA2DEN,
+ .default_lcdcon2 = (ATMEL_LCDC_DISTYPE_TFT
+ | ATMEL_LCDC_INVCLK
+ | ATMEL_LCDC_CLKMOD_ALWAYSACTIVE
+ | ATMEL_LCDC_MEMOR_BIG),
+ .default_monspecs = &atstk1000_default_monspecs,
+ .guard_time = 2,
+};
diff --git a/arch/avr32/mach-at32ap/at32ap7000.c b/arch/avr32/mach-at32ap/at32ap7000.c
index 56db45b..1d2bf34 100644
--- a/arch/avr32/mach-at32ap/at32ap7000.c
+++ b/arch/avr32/mach-at32ap/at32ap7000.c
@@ -6,6 +6,7 @@
* published by the Free Software Foundation.
*/
#include <linux/clk.h>
+#include <linux/fb.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
@@ -17,6 +18,8 @@
#include <asm/arch/portmux.h>
#include <asm/arch/sm.h>

+#include <video/atmel_lcdc.h>
+
#include "clock.h"
#include "hmatrix.h"
#include "pio.h"
@@ -881,20 +884,26 @@ at32_add_device_spi(unsigned int id, struct spi_board_info *b, unsigned int n)
/* --------------------------------------------------------------------
* LCDC
* -------------------------------------------------------------------- */
-static struct lcdc_platform_data lcdc0_data;
-static struct resource lcdc0_resource[] = {
+static struct atmel_lcdfb_info atmel_lcdfb0_data;
+static struct resource atmel_lcdfb0_resource[] = {
{
.start = 0xff000000,
.end = 0xff000fff,
.flags = IORESOURCE_MEM,
},
IRQ(1),
+ {
+ /* Placeholder for pre-allocated fb memory */
+ .start = 0x00000000,
+ .end = 0x00000000,
+ .flags = 0,
+ },
};
-DEFINE_DEV_DATA(lcdc, 0);
-DEV_CLK(hclk, lcdc0, hsb, 7);
-static struct clk lcdc0_pixclk = {
- .name = "pixclk",
- .dev = &lcdc0_device.dev,
+DEFINE_DEV_DATA(atmel_lcdfb, 0);
+DEV_CLK(hck1, atmel_lcdfb0, hsb, 7);
+static struct clk atmel_lcdfb0_pixclk = {
+ .name = "lcdc_clk",
+ .dev = &atmel_lcdfb0_device.dev,
.mode = genclk_mode,
.get_rate = genclk_get_rate,
.set_rate = genclk_set_rate,
@@ -903,13 +912,34 @@ static struct clk lcdc0_pixclk = {
};

struct platform_device *__init
-at32_add_device_lcdc(unsigned int id, struct lcdc_platform_data *data)
+at32_add_device_lcdc(unsigned int id, struct atmel_lcdfb_info *data,
+ unsigned long fbmem_start, unsigned long fbmem_len)
{
struct platform_device *pdev;
+ struct atmel_lcdfb_info *info;
+ struct fb_monspecs *monspecs;
+ struct fb_videomode *modedb;
+ unsigned int modedb_size;
+
+ /*
+ * Do a deep copy of the fb data, monspecs and modedb. Make
+ * sure all allocations are done before setting up the
+ * portmux.
+ */
+ monspecs = kmemdup(data->default_monspecs,
+ sizeof(struct fb_monspecs), GFP_KERNEL);
+ if (!monspecs)
+ return NULL;
+
+ modedb_size = sizeof(struct fb_videomode) * monspecs->modedb_len;
+ modedb = kmemdup(monspecs->modedb, modedb_size, GFP_KERNEL);
+ if (!modedb)
+ goto err_dup_modedb;
+ monspecs->modedb = modedb;

switch (id) {
case 0:
- pdev = &lcdc0_device;
+ pdev = &atmel_lcdfb0_device;
select_peripheral(PC(19), PERIPH_A, 0); /* CC */
select_peripheral(PC(20), PERIPH_A, 0); /* HSYNC */
select_peripheral(PC(21), PERIPH_A, 0); /* PCLK */
@@ -942,19 +972,32 @@ at32_add_device_lcdc(unsigned int id, struct lcdc_platform_data *data)
select_peripheral(PD(16), PERIPH_A, 0); /* DATA22 */
select_peripheral(PD(17), PERIPH_A, 0); /* DATA23 */

- clk_set_parent(&lcdc0_pixclk, &pll0);
- clk_set_rate(&lcdc0_pixclk, clk_get_rate(&pll0));
+ clk_set_parent(&atmel_lcdfb0_pixclk, &pll0);
+ clk_set_rate(&atmel_lcdfb0_pixclk, clk_get_rate(&pll0));
break;

default:
- return NULL;
+ goto err_invalid_id;
}

- memcpy(pdev->dev.platform_data, data,
- sizeof(struct lcdc_platform_data));
+ if (fbmem_len) {
+ pdev->resource[2].start = fbmem_start;
+ pdev->resource[2].end = fbmem_start + fbmem_len - 1;
+ pdev->resource[2].flags = IORESOURCE_MEM;
+ }
+
+ info = pdev->dev.platform_data;
+ memcpy(info, data, sizeof(struct atmel_lcdfb_info));
+ info->default_monspecs = monspecs;

platform_device_register(pdev);
return pdev;
+
+err_invalid_id:
+ kfree(modedb);
+err_dup_modedb:
+ kfree(monspecs);
+ return NULL;
}

/* --------------------------------------------------------------------
@@ -1037,8 +1080,8 @@ struct clk *at32_clock_list[] = {
&macb1_pclk,
&atmel_spi0_spi_clk,
&atmel_spi1_spi_clk,
- &lcdc0_hclk,
- &lcdc0_pixclk,
+ &atmel_lcdfb0_hck1,
+ &atmel_lcdfb0_pixclk,
&gclk0,
&gclk1,
&gclk2,
@@ -1077,7 +1120,7 @@ void __init at32_clock_init(void)
genclk_init_parent(&gclk2);
genclk_init_parent(&gclk3);
genclk_init_parent(&gclk4);
- genclk_init_parent(&lcdc0_pixclk);
+ genclk_init_parent(&atmel_lcdfb0_pixclk);

/*
* Turn on all clocks that have at least one user already, and
diff --git a/include/asm-avr32/arch-at32ap/board.h b/include/asm-avr32/arch-at32ap/board.h
index 1a7b07d..9fd2e32 100644
--- a/include/asm-avr32/arch-at32ap/board.h
+++ b/include/asm-avr32/arch-at32ap/board.h
@@ -30,11 +30,9 @@ struct spi_board_info;
struct platform_device *
at32_add_device_spi(unsigned int id, struct spi_board_info *b, unsigned int n);

-struct lcdc_platform_data {
- unsigned long fbmem_start;
- unsigned long fbmem_size;
-};
+struct atmel_lcdfb_info;
struct platform_device *
-at32_add_device_lcdc(unsigned int id, struct lcdc_platform_data *data);
+at32_add_device_lcdc(unsigned int id, struct atmel_lcdfb_info *data,
+ unsigned long fbmem_start, unsigned long fbmem_len);

#endif /* __ASM_ARCH_BOARD_H */
--
1.4.4.4
-
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