diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/mach-omap2/gpmc-onenand.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/arm/mach-omap2/gpmc-onenand.c | 409 |
1 files changed, 0 insertions, 409 deletions
diff --git a/ANDROID_3.4.5/arch/arm/mach-omap2/gpmc-onenand.c b/ANDROID_3.4.5/arch/arm/mach-omap2/gpmc-onenand.c deleted file mode 100644 index 385b3e02..00000000 --- a/ANDROID_3.4.5/arch/arm/mach-omap2/gpmc-onenand.c +++ /dev/null @@ -1,409 +0,0 @@ -/* - * linux/arch/arm/mach-omap2/gpmc-onenand.c - * - * Copyright (C) 2006 - 2009 Nokia Corporation - * Contacts: Juha Yrjola - * Tony Lindgren - * - * 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. - */ - -#include <linux/string.h> -#include <linux/kernel.h> -#include <linux/platform_device.h> -#include <linux/mtd/onenand_regs.h> -#include <linux/io.h> - -#include <asm/mach/flash.h> - -#include <plat/cpu.h> -#include <plat/onenand.h> -#include <plat/board.h> -#include <plat/gpmc.h> - -static struct omap_onenand_platform_data *gpmc_onenand_data; - -static struct platform_device gpmc_onenand_device = { - .name = "omap2-onenand", - .id = -1, -}; - -static int omap2_onenand_set_async_mode(int cs, void __iomem *onenand_base) -{ - struct gpmc_timings t; - u32 reg; - int err; - - const int t_cer = 15; - const int t_avdp = 12; - const int t_aavdh = 7; - const int t_ce = 76; - const int t_aa = 76; - const int t_oe = 20; - const int t_cez = 20; /* max of t_cez, t_oez */ - const int t_ds = 30; - const int t_wpl = 40; - const int t_wph = 30; - - /* Ensure sync read and sync write are disabled */ - reg = readw(onenand_base + ONENAND_REG_SYS_CFG1); - reg &= ~ONENAND_SYS_CFG1_SYNC_READ & ~ONENAND_SYS_CFG1_SYNC_WRITE; - writew(reg, onenand_base + ONENAND_REG_SYS_CFG1); - - memset(&t, 0, sizeof(t)); - t.sync_clk = 0; - t.cs_on = 0; - t.adv_on = 0; - - /* Read */ - t.adv_rd_off = gpmc_round_ns_to_ticks(max_t(int, t_avdp, t_cer)); - t.oe_on = t.adv_rd_off + gpmc_round_ns_to_ticks(t_aavdh); - t.access = t.adv_on + gpmc_round_ns_to_ticks(t_aa); - t.access = max_t(int, t.access, t.cs_on + gpmc_round_ns_to_ticks(t_ce)); - t.access = max_t(int, t.access, t.oe_on + gpmc_round_ns_to_ticks(t_oe)); - t.oe_off = t.access + gpmc_round_ns_to_ticks(1); - t.cs_rd_off = t.oe_off; - t.rd_cycle = t.cs_rd_off + gpmc_round_ns_to_ticks(t_cez); - - /* Write */ - t.adv_wr_off = t.adv_rd_off; - t.we_on = t.oe_on; - if (cpu_is_omap34xx()) { - t.wr_data_mux_bus = t.we_on; - t.wr_access = t.we_on + gpmc_round_ns_to_ticks(t_ds); - } - t.we_off = t.we_on + gpmc_round_ns_to_ticks(t_wpl); - t.cs_wr_off = t.we_off + gpmc_round_ns_to_ticks(t_wph); - t.wr_cycle = t.cs_wr_off + gpmc_round_ns_to_ticks(t_cez); - - /* Configure GPMC for asynchronous read */ - gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, - GPMC_CONFIG1_DEVICESIZE_16 | - GPMC_CONFIG1_MUXADDDATA); - - err = gpmc_cs_set_timings(cs, &t); - if (err) - return err; - - /* Ensure sync read and sync write are disabled */ - reg = readw(onenand_base + ONENAND_REG_SYS_CFG1); - reg &= ~ONENAND_SYS_CFG1_SYNC_READ & ~ONENAND_SYS_CFG1_SYNC_WRITE; - writew(reg, onenand_base + ONENAND_REG_SYS_CFG1); - - return 0; -} - -static void set_onenand_cfg(void __iomem *onenand_base, int latency, - int sync_read, int sync_write, int hf, int vhf) -{ - u32 reg; - - reg = readw(onenand_base + ONENAND_REG_SYS_CFG1); - reg &= ~((0x7 << ONENAND_SYS_CFG1_BRL_SHIFT) | (0x7 << 9)); - reg |= (latency << ONENAND_SYS_CFG1_BRL_SHIFT) | - ONENAND_SYS_CFG1_BL_16; - if (sync_read) - reg |= ONENAND_SYS_CFG1_SYNC_READ; - else - reg &= ~ONENAND_SYS_CFG1_SYNC_READ; - if (sync_write) - reg |= ONENAND_SYS_CFG1_SYNC_WRITE; - else - reg &= ~ONENAND_SYS_CFG1_SYNC_WRITE; - if (hf) - reg |= ONENAND_SYS_CFG1_HF; - else - reg &= ~ONENAND_SYS_CFG1_HF; - if (vhf) - reg |= ONENAND_SYS_CFG1_VHF; - else - reg &= ~ONENAND_SYS_CFG1_VHF; - writew(reg, onenand_base + ONENAND_REG_SYS_CFG1); -} - -static int omap2_onenand_get_freq(struct omap_onenand_platform_data *cfg, - void __iomem *onenand_base, bool *clk_dep) -{ - u16 ver = readw(onenand_base + ONENAND_REG_VERSION_ID); - int freq = 0; - - if (cfg->get_freq) { - struct onenand_freq_info fi; - - fi.maf_id = readw(onenand_base + ONENAND_REG_MANUFACTURER_ID); - fi.dev_id = readw(onenand_base + ONENAND_REG_DEVICE_ID); - fi.ver_id = ver; - freq = cfg->get_freq(&fi, clk_dep); - if (freq) - return freq; - } - - switch ((ver >> 4) & 0xf) { - case 0: - freq = 40; - break; - case 1: - freq = 54; - break; - case 2: - freq = 66; - break; - case 3: - freq = 83; - break; - case 4: - freq = 104; - break; - default: - freq = 54; - break; - } - - return freq; -} - -static int omap2_onenand_set_sync_mode(struct omap_onenand_platform_data *cfg, - void __iomem *onenand_base, - int *freq_ptr) -{ - struct gpmc_timings t; - const int t_cer = 15; - const int t_avdp = 12; - const int t_cez = 20; /* max of t_cez, t_oez */ - const int t_ds = 30; - const int t_wpl = 40; - const int t_wph = 30; - int min_gpmc_clk_period, t_ces, t_avds, t_avdh, t_ach, t_aavdh, t_rdyo; - int tick_ns, div, fclk_offset_ns, fclk_offset, gpmc_clk_ns, latency; - int first_time = 0, hf = 0, vhf = 0, sync_read = 0, sync_write = 0; - int err, ticks_cez; - int cs = cfg->cs, freq = *freq_ptr; - u32 reg; - bool clk_dep = false; - - if (cfg->flags & ONENAND_SYNC_READ) { - sync_read = 1; - } else if (cfg->flags & ONENAND_SYNC_READWRITE) { - sync_read = 1; - sync_write = 1; - } else - return omap2_onenand_set_async_mode(cs, onenand_base); - - if (!freq) { - /* Very first call freq is not known */ - err = omap2_onenand_set_async_mode(cs, onenand_base); - if (err) - return err; - freq = omap2_onenand_get_freq(cfg, onenand_base, &clk_dep); - first_time = 1; - } - - switch (freq) { - case 104: - min_gpmc_clk_period = 9600; /* 104 MHz */ - t_ces = 3; - t_avds = 4; - t_avdh = 2; - t_ach = 3; - t_aavdh = 6; - t_rdyo = 6; - break; - case 83: - min_gpmc_clk_period = 12000; /* 83 MHz */ - t_ces = 5; - t_avds = 4; - t_avdh = 2; - t_ach = 6; - t_aavdh = 6; - t_rdyo = 9; - break; - case 66: - min_gpmc_clk_period = 15000; /* 66 MHz */ - t_ces = 6; - t_avds = 5; - t_avdh = 2; - t_ach = 6; - t_aavdh = 6; - t_rdyo = 11; - break; - default: - min_gpmc_clk_period = 18500; /* 54 MHz */ - t_ces = 7; - t_avds = 7; - t_avdh = 7; - t_ach = 9; - t_aavdh = 7; - t_rdyo = 15; - sync_write = 0; - break; - } - - tick_ns = gpmc_ticks_to_ns(1); - div = gpmc_cs_calc_divider(cs, min_gpmc_clk_period); - gpmc_clk_ns = gpmc_ticks_to_ns(div); - if (gpmc_clk_ns < 15) /* >66Mhz */ - hf = 1; - if (gpmc_clk_ns < 12) /* >83Mhz */ - vhf = 1; - if (vhf) - latency = 8; - else if (hf) - latency = 6; - else if (gpmc_clk_ns >= 25) /* 40 MHz*/ - latency = 3; - else - latency = 4; - - if (clk_dep) { - if (gpmc_clk_ns < 12) { /* >83Mhz */ - t_ces = 3; - t_avds = 4; - } else if (gpmc_clk_ns < 15) { /* >66Mhz */ - t_ces = 5; - t_avds = 4; - } else if (gpmc_clk_ns < 25) { /* >40Mhz */ - t_ces = 6; - t_avds = 5; - } else { - t_ces = 7; - t_avds = 7; - } - } - - if (first_time) - set_onenand_cfg(onenand_base, latency, - sync_read, sync_write, hf, vhf); - - if (div == 1) { - reg = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG2); - reg |= (1 << 7); - gpmc_cs_write_reg(cs, GPMC_CS_CONFIG2, reg); - reg = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG3); - reg |= (1 << 7); - gpmc_cs_write_reg(cs, GPMC_CS_CONFIG3, reg); - reg = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG4); - reg |= (1 << 7); - reg |= (1 << 23); - gpmc_cs_write_reg(cs, GPMC_CS_CONFIG4, reg); - } else { - reg = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG2); - reg &= ~(1 << 7); - gpmc_cs_write_reg(cs, GPMC_CS_CONFIG2, reg); - reg = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG3); - reg &= ~(1 << 7); - gpmc_cs_write_reg(cs, GPMC_CS_CONFIG3, reg); - reg = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG4); - reg &= ~(1 << 7); - reg &= ~(1 << 23); - gpmc_cs_write_reg(cs, GPMC_CS_CONFIG4, reg); - } - - /* Set synchronous read timings */ - memset(&t, 0, sizeof(t)); - t.sync_clk = min_gpmc_clk_period; - t.cs_on = 0; - t.adv_on = 0; - fclk_offset_ns = gpmc_round_ns_to_ticks(max_t(int, t_ces, t_avds)); - fclk_offset = gpmc_ns_to_ticks(fclk_offset_ns); - t.page_burst_access = gpmc_clk_ns; - - /* Read */ - t.adv_rd_off = gpmc_ticks_to_ns(fclk_offset + gpmc_ns_to_ticks(t_avdh)); - t.oe_on = gpmc_ticks_to_ns(fclk_offset + gpmc_ns_to_ticks(t_ach)); - /* Force at least 1 clk between AVD High to OE Low */ - if (t.oe_on <= t.adv_rd_off) - t.oe_on = t.adv_rd_off + gpmc_round_ns_to_ticks(1); - t.access = gpmc_ticks_to_ns(fclk_offset + (latency + 1) * div); - t.oe_off = t.access + gpmc_round_ns_to_ticks(1); - t.cs_rd_off = t.oe_off; - ticks_cez = ((gpmc_ns_to_ticks(t_cez) + div - 1) / div) * div; - t.rd_cycle = gpmc_ticks_to_ns(fclk_offset + (latency + 1) * div + - ticks_cez); - - /* Write */ - if (sync_write) { - t.adv_wr_off = t.adv_rd_off; - t.we_on = 0; - t.we_off = t.cs_rd_off; - t.cs_wr_off = t.cs_rd_off; - t.wr_cycle = t.rd_cycle; - if (cpu_is_omap34xx()) { - t.wr_data_mux_bus = gpmc_ticks_to_ns(fclk_offset + - gpmc_ps_to_ticks(min_gpmc_clk_period + - t_rdyo * 1000)); - t.wr_access = t.access; - } - } else { - t.adv_wr_off = gpmc_round_ns_to_ticks(max_t(int, - t_avdp, t_cer)); - t.we_on = t.adv_wr_off + gpmc_round_ns_to_ticks(t_aavdh); - t.we_off = t.we_on + gpmc_round_ns_to_ticks(t_wpl); - t.cs_wr_off = t.we_off + gpmc_round_ns_to_ticks(t_wph); - t.wr_cycle = t.cs_wr_off + gpmc_round_ns_to_ticks(t_cez); - if (cpu_is_omap34xx()) { - t.wr_data_mux_bus = t.we_on; - t.wr_access = t.we_on + gpmc_round_ns_to_ticks(t_ds); - } - } - - /* Configure GPMC for synchronous read */ - gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, - GPMC_CONFIG1_WRAPBURST_SUPP | - GPMC_CONFIG1_READMULTIPLE_SUPP | - (sync_read ? GPMC_CONFIG1_READTYPE_SYNC : 0) | - (sync_write ? GPMC_CONFIG1_WRITEMULTIPLE_SUPP : 0) | - (sync_write ? GPMC_CONFIG1_WRITETYPE_SYNC : 0) | - GPMC_CONFIG1_CLKACTIVATIONTIME(fclk_offset) | - GPMC_CONFIG1_PAGE_LEN(2) | - (cpu_is_omap34xx() ? 0 : - (GPMC_CONFIG1_WAIT_READ_MON | - GPMC_CONFIG1_WAIT_PIN_SEL(0))) | - GPMC_CONFIG1_DEVICESIZE_16 | - GPMC_CONFIG1_DEVICETYPE_NOR | - GPMC_CONFIG1_MUXADDDATA); - - err = gpmc_cs_set_timings(cs, &t); - if (err) - return err; - - set_onenand_cfg(onenand_base, latency, sync_read, sync_write, hf, vhf); - - *freq_ptr = freq; - - return 0; -} - -static int gpmc_onenand_setup(void __iomem *onenand_base, int *freq_ptr) -{ - struct device *dev = &gpmc_onenand_device.dev; - - /* Set sync timings in GPMC */ - if (omap2_onenand_set_sync_mode(gpmc_onenand_data, onenand_base, - freq_ptr) < 0) { - dev_err(dev, "Unable to set synchronous mode\n"); - return -EINVAL; - } - - return 0; -} - -void __init gpmc_onenand_init(struct omap_onenand_platform_data *_onenand_data) -{ - gpmc_onenand_data = _onenand_data; - gpmc_onenand_data->onenand_setup = gpmc_onenand_setup; - gpmc_onenand_device.dev.platform_data = gpmc_onenand_data; - - if (cpu_is_omap24xx() && - (gpmc_onenand_data->flags & ONENAND_SYNC_READWRITE)) { - printk(KERN_ERR "Onenand using only SYNC_READ on 24xx\n"); - gpmc_onenand_data->flags &= ~ONENAND_SYNC_READWRITE; - gpmc_onenand_data->flags |= ONENAND_SYNC_READ; - } - - if (platform_device_register(&gpmc_onenand_device) < 0) { - printk(KERN_ERR "Unable to register OneNAND device\n"); - return; - } -} |