diff options
author | Jon Hunter <jon-hunter@ti.com> | 2013-02-21 12:42:22 -0600 |
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committer | Jon Hunter <jon-hunter@ti.com> | 2013-04-01 14:53:42 -0500 |
commit | 3aef65ee5d28df4e1415be2c83fb3eb90e9cfc3f (patch) | |
tree | 973c9471f956ac57d6fcb769ad8a97937a819ae4 /arch/arm | |
parent | aa8d4767da2a2a29a628dc0dadb59a010f0ec18e (diff) | |
download | op-kernel-dev-3aef65ee5d28df4e1415be2c83fb3eb90e9cfc3f.zip op-kernel-dev-3aef65ee5d28df4e1415be2c83fb3eb90e9cfc3f.tar.gz |
ARM: OMAP2+: Convert ONENAND to use gpmc_cs_program_settings()
Convert the OMAP2+ ONENAND code to use the gpmc_cs_program_settings()
function for configuring the various GPMC options instead of directly
programming the CONFIG1 register.
Signed-off-by: Jon Hunter <jon-hunter@ti.com>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Diffstat (limited to 'arch/arm')
-rw-r--r-- | arch/arm/mach-omap2/gpmc-onenand.c | 61 |
1 files changed, 25 insertions, 36 deletions
diff --git a/arch/arm/mach-omap2/gpmc-onenand.c b/arch/arm/mach-omap2/gpmc-onenand.c index e175ceb..46aac83 100644 --- a/arch/arm/mach-omap2/gpmc-onenand.c +++ b/arch/arm/mach-omap2/gpmc-onenand.c @@ -48,18 +48,22 @@ static struct platform_device gpmc_onenand_device = { }; static struct gpmc_settings onenand_async = { + .device_width = GPMC_DEVWIDTH_16BIT, .mux_add_data = GPMC_MUX_AD, }; static struct gpmc_settings onenand_sync = { .burst_read = true, + .burst_wrap = true, + .burst_len = GPMC_BURST_16, + .device_width = GPMC_DEVWIDTH_16BIT, .mux_add_data = GPMC_MUX_AD, + .wait_pin = 0, }; static void omap2_onenand_calc_async_timings(struct gpmc_timings *t) { struct gpmc_device_timings dev_t; - const int t_cer = 15; const int t_avdp = 12; const int t_aavdh = 7; @@ -86,16 +90,6 @@ static void omap2_onenand_calc_async_timings(struct gpmc_timings *t) gpmc_calc_timings(t, &onenand_async, &dev_t); } -static int gpmc_set_async_mode(int cs, struct gpmc_timings *t) -{ - /* Configure GPMC for asynchronous read */ - gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, - GPMC_CONFIG1_DEVICESIZE_16 | - GPMC_CONFIG1_MUXADDDATA); - - return gpmc_cs_set_timings(cs, t); -} - static void omap2_onenand_set_async_mode(void __iomem *onenand_base) { u32 reg; @@ -243,8 +237,11 @@ static void omap2_onenand_calc_sync_timings(struct gpmc_timings *t, /* Set synchronous read timings */ memset(&dev_t, 0, sizeof(dev_t)); + if (onenand_flags & ONENAND_FLAG_SYNCREAD) + onenand_sync.sync_read = true; if (onenand_flags & ONENAND_FLAG_SYNCWRITE) { onenand_sync.sync_write = true; + onenand_sync.burst_write = true; } else { dev_t.t_avdp_w = max(t_avdp, t_cer) * 1000; dev_t.t_wpl = t_wpl * 1000; @@ -270,29 +267,6 @@ static void omap2_onenand_calc_sync_timings(struct gpmc_timings *t, gpmc_calc_timings(t, &onenand_sync, &dev_t); } -static int gpmc_set_sync_mode(int cs, struct gpmc_timings *t) -{ - unsigned sync_read = onenand_flags & ONENAND_FLAG_SYNCREAD; - unsigned sync_write = onenand_flags & ONENAND_FLAG_SYNCWRITE; - - /* 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_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); - - return gpmc_cs_set_timings(cs, t); -} - static int omap2_onenand_setup_async(void __iomem *onenand_base) { struct gpmc_timings t; @@ -302,7 +276,11 @@ static int omap2_onenand_setup_async(void __iomem *onenand_base) omap2_onenand_calc_async_timings(&t); - ret = gpmc_set_async_mode(gpmc_onenand_data->cs, &t); + ret = gpmc_cs_program_settings(gpmc_onenand_data->cs, &onenand_async); + if (ret < 0) + return ret; + + ret = gpmc_cs_set_timings(gpmc_onenand_data->cs, &t); if (ret < 0) return ret; @@ -322,9 +300,20 @@ static int omap2_onenand_setup_sync(void __iomem *onenand_base, int *freq_ptr) set_onenand_cfg(onenand_base); } + /* + * FIXME: Appears to be legacy code from initial ONENAND commit. + * Unclear what boards this is for and if this can be removed. + */ + if (!cpu_is_omap34xx()) + onenand_sync.wait_on_read = true; + omap2_onenand_calc_sync_timings(&t, gpmc_onenand_data->flags, freq); - ret = gpmc_set_sync_mode(gpmc_onenand_data->cs, &t); + ret = gpmc_cs_program_settings(gpmc_onenand_data->cs, &onenand_sync); + if (ret < 0) + return ret; + + ret = gpmc_cs_set_timings(gpmc_onenand_data->cs, &t); if (ret < 0) return ret; |