| /* |
| * linux/arch/arm/mach-versatile/core.c |
| * |
| * Copyright (C) 1999 - 2003 ARM Limited |
| * Copyright (C) 2000 Deep Blue Solutions Ltd |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #include <linux/init.h> |
| #include <linux/device.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/platform_device.h> |
| #include <linux/interrupt.h> |
| #include <linux/of_platform.h> |
| #include <linux/amba/bus.h> |
| #include <linux/amba/clcd.h> |
| #include <linux/platform_data/video-clcd-versatile.h> |
| #include <linux/amba/mmci.h> |
| #include <linux/io.h> |
| #include <linux/mtd/physmap.h> |
| #include <linux/reboot.h> |
| |
| #include <asm/mach/arch.h> |
| #include <asm/mach/map.h> |
| #include <mach/hardware.h> |
| #include <mach/platform.h> |
| |
| #include "core.h" |
| |
| static struct map_desc versatile_io_desc[] __initdata __maybe_unused = { |
| { |
| .virtual = IO_ADDRESS(VERSATILE_SYS_BASE), |
| .pfn = __phys_to_pfn(VERSATILE_SYS_BASE), |
| .length = SZ_4K, |
| .type = MT_DEVICE |
| }, { |
| .virtual = IO_ADDRESS(VERSATILE_SCTL_BASE), |
| .pfn = __phys_to_pfn(VERSATILE_SCTL_BASE), |
| .length = SZ_4K * 9, |
| .type = MT_DEVICE |
| }, |
| { |
| .virtual = IO_ADDRESS(VERSATILE_IB2_BASE), |
| .pfn = __phys_to_pfn(VERSATILE_IB2_BASE), |
| .length = SZ_64M, |
| .type = MT_DEVICE |
| }, |
| }; |
| |
| void __init versatile_map_io(void) |
| { |
| debug_ll_io_init(); |
| iotable_init(versatile_io_desc, ARRAY_SIZE(versatile_io_desc)); |
| } |
| |
| |
| #define VERSATILE_FLASHCTRL (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_FLASH_OFFSET) |
| |
| static void versatile_flash_set_vpp(struct platform_device *pdev, int on) |
| { |
| u32 val; |
| |
| val = __raw_readl(VERSATILE_FLASHCTRL); |
| if (on) |
| val |= VERSATILE_FLASHPROG_FLVPPEN; |
| else |
| val &= ~VERSATILE_FLASHPROG_FLVPPEN; |
| __raw_writel(val, VERSATILE_FLASHCTRL); |
| } |
| |
| static struct physmap_flash_data versatile_flash_data = { |
| .width = 4, |
| .set_vpp = versatile_flash_set_vpp, |
| }; |
| |
| static struct resource versatile_flash_resource = { |
| .start = VERSATILE_FLASH_BASE, |
| .end = VERSATILE_FLASH_BASE + VERSATILE_FLASH_SIZE - 1, |
| .flags = IORESOURCE_MEM, |
| }; |
| |
| struct platform_device versatile_flash_device = { |
| .name = "physmap-flash", |
| .id = 0, |
| .dev = { |
| .platform_data = &versatile_flash_data, |
| }, |
| .num_resources = 1, |
| .resource = &versatile_flash_resource, |
| }; |
| |
| #define VERSATILE_SYSMCI (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_MCI_OFFSET) |
| |
| unsigned int mmc_status(struct device *dev) |
| { |
| struct amba_device *adev = container_of(dev, struct amba_device, dev); |
| u32 mask; |
| |
| if (adev->res.start == VERSATILE_MMCI0_BASE) |
| mask = 1; |
| else |
| mask = 2; |
| |
| return readl(VERSATILE_SYSMCI) & mask; |
| } |
| |
| static struct mmci_platform_data mmc0_plat_data = { |
| .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34, |
| .status = mmc_status, |
| .gpio_wp = -1, |
| .gpio_cd = -1, |
| }; |
| |
| static struct mmci_platform_data mmc1_plat_data = { |
| .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34, |
| .status = mmc_status, |
| .gpio_wp = -1, |
| .gpio_cd = -1, |
| }; |
| |
| /* |
| * CLCD support. |
| */ |
| #define SYS_CLCD_MODE_MASK (3 << 0) |
| #define SYS_CLCD_MODE_888 (0 << 0) |
| #define SYS_CLCD_MODE_5551 (1 << 0) |
| #define SYS_CLCD_MODE_565_RLSB (2 << 0) |
| #define SYS_CLCD_MODE_565_BLSB (3 << 0) |
| #define SYS_CLCD_NLCDIOON (1 << 2) |
| #define SYS_CLCD_VDDPOSSWITCH (1 << 3) |
| #define SYS_CLCD_PWR3V5SWITCH (1 << 4) |
| #define SYS_CLCD_ID_MASK (0x1f << 8) |
| #define SYS_CLCD_ID_SANYO_3_8 (0x00 << 8) |
| #define SYS_CLCD_ID_UNKNOWN_8_4 (0x01 << 8) |
| #define SYS_CLCD_ID_EPSON_2_2 (0x02 << 8) |
| #define SYS_CLCD_ID_SANYO_2_5 (0x07 << 8) |
| #define SYS_CLCD_ID_VGA (0x1f << 8) |
| |
| static bool is_sanyo_2_5_lcd; |
| |
| /* |
| * Disable all display connectors on the interface module. |
| */ |
| static void versatile_clcd_disable(struct clcd_fb *fb) |
| { |
| void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET; |
| u32 val; |
| |
| val = readl(sys_clcd); |
| val &= ~SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH; |
| writel(val, sys_clcd); |
| |
| /* |
| * If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light off |
| */ |
| if (of_machine_is_compatible("arm,versatile-ab") && is_sanyo_2_5_lcd) { |
| void __iomem *versatile_ib2_ctrl = __io_address(VERSATILE_IB2_CTRL); |
| unsigned long ctrl; |
| |
| ctrl = readl(versatile_ib2_ctrl); |
| ctrl &= ~0x01; |
| writel(ctrl, versatile_ib2_ctrl); |
| } |
| } |
| |
| /* |
| * Enable the relevant connector on the interface module. |
| */ |
| static void versatile_clcd_enable(struct clcd_fb *fb) |
| { |
| struct fb_var_screeninfo *var = &fb->fb.var; |
| void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET; |
| u32 val; |
| |
| val = readl(sys_clcd); |
| val &= ~SYS_CLCD_MODE_MASK; |
| |
| switch (var->green.length) { |
| case 5: |
| val |= SYS_CLCD_MODE_5551; |
| break; |
| case 6: |
| if (var->red.offset == 0) |
| val |= SYS_CLCD_MODE_565_RLSB; |
| else |
| val |= SYS_CLCD_MODE_565_BLSB; |
| break; |
| case 8: |
| val |= SYS_CLCD_MODE_888; |
| break; |
| } |
| |
| /* |
| * Set the MUX |
| */ |
| writel(val, sys_clcd); |
| |
| /* |
| * And now enable the PSUs |
| */ |
| val |= SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH; |
| writel(val, sys_clcd); |
| |
| /* |
| * If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light on |
| */ |
| if (of_machine_is_compatible("arm,versatile-ab") && is_sanyo_2_5_lcd) { |
| void __iomem *versatile_ib2_ctrl = __io_address(VERSATILE_IB2_CTRL); |
| unsigned long ctrl; |
| |
| ctrl = readl(versatile_ib2_ctrl); |
| ctrl |= 0x01; |
| writel(ctrl, versatile_ib2_ctrl); |
| } |
| } |
| |
| /* |
| * Detect which LCD panel is connected, and return the appropriate |
| * clcd_panel structure. Note: we do not have any information on |
| * the required timings for the 8.4in panel, so we presently assume |
| * VGA timings. |
| */ |
| static int versatile_clcd_setup(struct clcd_fb *fb) |
| { |
| void __iomem *sys_clcd = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET; |
| const char *panel_name; |
| u32 val; |
| |
| is_sanyo_2_5_lcd = false; |
| |
| val = readl(sys_clcd) & SYS_CLCD_ID_MASK; |
| if (val == SYS_CLCD_ID_SANYO_3_8) |
| panel_name = "Sanyo TM38QV67A02A"; |
| else if (val == SYS_CLCD_ID_SANYO_2_5) { |
| panel_name = "Sanyo QVGA Portrait"; |
| is_sanyo_2_5_lcd = true; |
| } else if (val == SYS_CLCD_ID_EPSON_2_2) |
| panel_name = "Epson L2F50113T00"; |
| else if (val == SYS_CLCD_ID_VGA) |
| panel_name = "VGA"; |
| else { |
| printk(KERN_ERR "CLCD: unknown LCD panel ID 0x%08x, using VGA\n", |
| val); |
| panel_name = "VGA"; |
| } |
| |
| fb->panel = versatile_clcd_get_panel(panel_name); |
| if (!fb->panel) |
| return -EINVAL; |
| |
| return versatile_clcd_setup_dma(fb, SZ_1M); |
| } |
| |
| static void versatile_clcd_decode(struct clcd_fb *fb, struct clcd_regs *regs) |
| { |
| clcdfb_decode(fb, regs); |
| |
| /* Always clear BGR for RGB565: we do the routing externally */ |
| if (fb->fb.var.green.length == 6) |
| regs->cntl &= ~CNTL_BGR; |
| } |
| |
| static struct clcd_board clcd_plat_data = { |
| .name = "Versatile", |
| .caps = CLCD_CAP_5551 | CLCD_CAP_565 | CLCD_CAP_888, |
| .check = clcdfb_check, |
| .decode = versatile_clcd_decode, |
| .disable = versatile_clcd_disable, |
| .enable = versatile_clcd_enable, |
| .setup = versatile_clcd_setup, |
| .mmap = versatile_clcd_mmap_dma, |
| .remove = versatile_clcd_remove_dma, |
| }; |
| |
| /* |
| * Lookup table for attaching a specific name and platform_data pointer to |
| * devices as they get created by of_platform_populate(). Ideally this table |
| * would not exist, but the current clock implementation depends on some devices |
| * having a specific name. |
| */ |
| struct of_dev_auxdata versatile_auxdata_lookup[] __initdata = { |
| OF_DEV_AUXDATA("arm,primecell", VERSATILE_MMCI0_BASE, "fpga:05", &mmc0_plat_data), |
| OF_DEV_AUXDATA("arm,primecell", VERSATILE_MMCI1_BASE, "fpga:0b", &mmc1_plat_data), |
| |
| OF_DEV_AUXDATA("arm,primecell", VERSATILE_CLCD_BASE, "dev:20", &clcd_plat_data), |
| |
| {} |
| }; |
| |
| void versatile_restart(enum reboot_mode mode, const char *cmd) |
| { |
| void __iomem *sys = __io_address(VERSATILE_SYS_BASE); |
| u32 val; |
| |
| val = __raw_readl(sys + VERSATILE_SYS_RESETCTL_OFFSET); |
| val |= 0x105; |
| |
| __raw_writel(0xa05f, sys + VERSATILE_SYS_LOCK_OFFSET); |
| __raw_writel(val, sys + VERSATILE_SYS_RESETCTL_OFFSET); |
| __raw_writel(0, sys + VERSATILE_SYS_LOCK_OFFSET); |
| } |
| |
| /* Early initializations */ |
| void __init versatile_init_early(void) |
| { |
| u32 val; |
| |
| /* |
| * set clock frequency: |
| * VERSATILE_REFCLK is 32KHz |
| * VERSATILE_TIMCLK is 1MHz |
| */ |
| val = readl(__io_address(VERSATILE_SCTL_BASE)); |
| writel((VERSATILE_TIMCLK << VERSATILE_TIMER1_EnSel) | |
| (VERSATILE_TIMCLK << VERSATILE_TIMER2_EnSel) | |
| (VERSATILE_TIMCLK << VERSATILE_TIMER3_EnSel) | |
| (VERSATILE_TIMCLK << VERSATILE_TIMER4_EnSel) | val, |
| __io_address(VERSATILE_SCTL_BASE)); |
| } |