Merge tag 'locks-v3.16-2' of git://git.samba.org/jlayton/linux
[linux/fpc-iii.git] / arch / arm / mach-at91 / sam9_smc.c
blob826315af6d11c4bde262fbf44e92aefba20f2e90
1 /*
2 * linux/arch/arm/mach-at91/sam9_smc.c
4 * Copyright (C) 2008 Andrew Victor
5 * Copyright (C) 2011 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/module.h>
13 #include <linux/io.h>
14 #include <linux/of.h>
15 #include <linux/of_address.h>
17 #include <mach/at91sam9_smc.h>
19 #include "sam9_smc.h"
22 #define AT91_SMC_CS(id, n) (smc_base_addr[id] + ((n) * 0x10))
24 static void __iomem *smc_base_addr[2];
26 static void sam9_smc_cs_write_mode(void __iomem *base,
27 struct sam9_smc_config *config)
29 __raw_writel(config->mode
30 | AT91_SMC_TDF_(config->tdf_cycles),
31 base + AT91_SMC_MODE);
34 void sam9_smc_write_mode(int id, int cs,
35 struct sam9_smc_config *config)
37 sam9_smc_cs_write_mode(AT91_SMC_CS(id, cs), config);
39 EXPORT_SYMBOL_GPL(sam9_smc_write_mode);
41 static void sam9_smc_cs_configure(void __iomem *base,
42 struct sam9_smc_config *config)
45 /* Setup register */
46 __raw_writel(AT91_SMC_NWESETUP_(config->nwe_setup)
47 | AT91_SMC_NCS_WRSETUP_(config->ncs_write_setup)
48 | AT91_SMC_NRDSETUP_(config->nrd_setup)
49 | AT91_SMC_NCS_RDSETUP_(config->ncs_read_setup),
50 base + AT91_SMC_SETUP);
52 /* Pulse register */
53 __raw_writel(AT91_SMC_NWEPULSE_(config->nwe_pulse)
54 | AT91_SMC_NCS_WRPULSE_(config->ncs_write_pulse)
55 | AT91_SMC_NRDPULSE_(config->nrd_pulse)
56 | AT91_SMC_NCS_RDPULSE_(config->ncs_read_pulse),
57 base + AT91_SMC_PULSE);
59 /* Cycle register */
60 __raw_writel(AT91_SMC_NWECYCLE_(config->write_cycle)
61 | AT91_SMC_NRDCYCLE_(config->read_cycle),
62 base + AT91_SMC_CYCLE);
64 /* Mode register */
65 sam9_smc_cs_write_mode(base, config);
68 void sam9_smc_configure(int id, int cs,
69 struct sam9_smc_config *config)
71 sam9_smc_cs_configure(AT91_SMC_CS(id, cs), config);
73 EXPORT_SYMBOL_GPL(sam9_smc_configure);
75 static void sam9_smc_cs_read_mode(void __iomem *base,
76 struct sam9_smc_config *config)
78 u32 val = __raw_readl(base + AT91_SMC_MODE);
80 config->mode = (val & ~AT91_SMC_NWECYCLE);
81 config->tdf_cycles = (val & AT91_SMC_NWECYCLE) >> 16 ;
84 void sam9_smc_read_mode(int id, int cs,
85 struct sam9_smc_config *config)
87 sam9_smc_cs_read_mode(AT91_SMC_CS(id, cs), config);
89 EXPORT_SYMBOL_GPL(sam9_smc_read_mode);
91 static void sam9_smc_cs_read(void __iomem *base,
92 struct sam9_smc_config *config)
94 u32 val;
96 /* Setup register */
97 val = __raw_readl(base + AT91_SMC_SETUP);
99 config->nwe_setup = val & AT91_SMC_NWESETUP;
100 config->ncs_write_setup = (val & AT91_SMC_NCS_WRSETUP) >> 8;
101 config->nrd_setup = (val & AT91_SMC_NRDSETUP) >> 16;
102 config->ncs_read_setup = (val & AT91_SMC_NCS_RDSETUP) >> 24;
104 /* Pulse register */
105 val = __raw_readl(base + AT91_SMC_PULSE);
107 config->nwe_pulse = val & AT91_SMC_NWEPULSE;
108 config->ncs_write_pulse = (val & AT91_SMC_NCS_WRPULSE) >> 8;
109 config->nrd_pulse = (val & AT91_SMC_NRDPULSE) >> 16;
110 config->ncs_read_pulse = (val & AT91_SMC_NCS_RDPULSE) >> 24;
112 /* Cycle register */
113 val = __raw_readl(base + AT91_SMC_CYCLE);
115 config->write_cycle = val & AT91_SMC_NWECYCLE;
116 config->read_cycle = (val & AT91_SMC_NRDCYCLE) >> 16;
118 /* Mode register */
119 sam9_smc_cs_read_mode(base, config);
122 void sam9_smc_read(int id, int cs, struct sam9_smc_config *config)
124 sam9_smc_cs_read(AT91_SMC_CS(id, cs), config);
127 void __init at91sam9_ioremap_smc(int id, u32 addr)
129 if (id > 1) {
130 pr_warn("%s: id > 2\n", __func__);
131 return;
133 smc_base_addr[id] = ioremap(addr, 512);
134 if (!smc_base_addr[id])
135 pr_warn("Impossible to ioremap smc.%d 0x%x\n", id, addr);