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-rw-r--r--arch/avr32/mach-at32ap/Makefile2
-rw-r--r--arch/avr32/mach-at32ap/at32ap7000.c10
-rw-r--r--arch/avr32/mach-at32ap/hsmc.c164
-rw-r--r--arch/avr32/mach-at32ap/hsmc.h127
-rw-r--r--include/asm-avr32/arch-at32ap/smc.h60
5 files changed, 362 insertions, 1 deletions
diff --git a/arch/avr32/mach-at32ap/Makefile b/arch/avr32/mach-at32ap/Makefile
index 4b10853eb614..f62eb6915510 100644
--- a/arch/avr32/mach-at32ap/Makefile
+++ b/arch/avr32/mach-at32ap/Makefile
@@ -1,2 +1,2 @@
1obj-y += at32ap.o clock.o pio.o intc.o extint.o 1obj-y += at32ap.o clock.o pio.o intc.o extint.o hsmc.o
2obj-$(CONFIG_CPU_AT32AP7000) += at32ap7000.o 2obj-$(CONFIG_CPU_AT32AP7000) += at32ap7000.o
diff --git a/arch/avr32/mach-at32ap/at32ap7000.c b/arch/avr32/mach-at32ap/at32ap7000.c
index e8c6893a1c23..37982b60398e 100644
--- a/arch/avr32/mach-at32ap/at32ap7000.c
+++ b/arch/avr32/mach-at32ap/at32ap7000.c
@@ -450,6 +450,13 @@ static struct clk hramc_clk = {
450 .users = 1, 450 .users = 1,
451}; 451};
452 452
453static struct resource smc0_resource[] = {
454 PBMEM(0xfff03400),
455};
456DEFINE_DEV(smc, 0);
457DEV_CLK(pclk, smc0, pbb, 13);
458DEV_CLK(mck, smc0, hsb, 0);
459
453static struct platform_device pdc_device = { 460static struct platform_device pdc_device = {
454 .name = "pdc", 461 .name = "pdc",
455 .id = 0, 462 .id = 0,
@@ -503,6 +510,7 @@ void __init at32_add_system_devices(void)
503 510
504 platform_device_register(&at32_sm_device); 511 platform_device_register(&at32_sm_device);
505 platform_device_register(&at32_intc0_device); 512 platform_device_register(&at32_intc0_device);
513 platform_device_register(&smc0_device);
506 platform_device_register(&pdc_device); 514 platform_device_register(&pdc_device);
507 515
508 platform_device_register(&pio0_device); 516 platform_device_register(&pio0_device);
@@ -796,6 +804,8 @@ struct clk *at32_clock_list[] = {
796 &at32_intc0_pclk, 804 &at32_intc0_pclk,
797 &ebi_clk, 805 &ebi_clk,
798 &hramc_clk, 806 &hramc_clk,
807 &smc0_pclk,
808 &smc0_mck,
799 &pdc_hclk, 809 &pdc_hclk,
800 &pdc_pclk, 810 &pdc_pclk,
801 &pico_clk, 811 &pico_clk,
diff --git a/arch/avr32/mach-at32ap/hsmc.c b/arch/avr32/mach-at32ap/hsmc.c
new file mode 100644
index 000000000000..7691721928a7
--- /dev/null
+++ b/arch/avr32/mach-at32ap/hsmc.c
@@ -0,0 +1,164 @@
1/*
2 * Static Memory Controller for AT32 chips
3 *
4 * Copyright (C) 2006 Atmel Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10#define DEBUG
11#include <linux/clk.h>
12#include <linux/err.h>
13#include <linux/init.h>
14#include <linux/module.h>
15#include <linux/platform_device.h>
16
17#include <asm/io.h>
18#include <asm/arch/smc.h>
19
20#include "hsmc.h"
21
22#define NR_CHIP_SELECTS 6
23
24struct hsmc {
25 void __iomem *regs;
26 struct clk *pclk;
27 struct clk *mck;
28};
29
30static struct hsmc *hsmc;
31
32int smc_set_configuration(int cs, const struct smc_config *config)
33{
34 unsigned long mul;
35 unsigned long offset;
36 u32 setup, pulse, cycle, mode;
37
38 if (!hsmc)
39 return -ENODEV;
40 if (cs >= NR_CHIP_SELECTS)
41 return -EINVAL;
42
43 /*
44 * cycles = x / T = x * f
45 * = ((x * 1000000000) * ((f * 65536) / 1000000000)) / 65536
46 * = ((x * 1000000000) * (((f / 10000) * 65536) / 100000)) / 65536
47 */
48 mul = (clk_get_rate(hsmc->mck) / 10000) << 16;
49 mul /= 100000;
50
51#define ns2cyc(x) ((((x) * mul) + 65535) >> 16)
52
53 setup = (HSMC_BF(NWE_SETUP, ns2cyc(config->nwe_setup))
54 | HSMC_BF(NCS_WR_SETUP, ns2cyc(config->ncs_write_setup))
55 | HSMC_BF(NRD_SETUP, ns2cyc(config->nrd_setup))
56 | HSMC_BF(NCS_RD_SETUP, ns2cyc(config->ncs_read_setup)));
57 pulse = (HSMC_BF(NWE_PULSE, ns2cyc(config->nwe_pulse))
58 | HSMC_BF(NCS_WR_PULSE, ns2cyc(config->ncs_write_pulse))
59 | HSMC_BF(NRD_PULSE, ns2cyc(config->nrd_pulse))
60 | HSMC_BF(NCS_RD_PULSE, ns2cyc(config->ncs_read_pulse)));
61 cycle = (HSMC_BF(NWE_CYCLE, ns2cyc(config->write_cycle))
62 | HSMC_BF(NRD_CYCLE, ns2cyc(config->read_cycle)));
63
64 switch (config->bus_width) {
65 case 1:
66 mode = HSMC_BF(DBW, HSMC_DBW_8_BITS);
67 break;
68 case 2:
69 mode = HSMC_BF(DBW, HSMC_DBW_16_BITS);
70 break;
71 case 4:
72 mode = HSMC_BF(DBW, HSMC_DBW_32_BITS);
73 break;
74 default:
75 return -EINVAL;
76 }
77
78 if (config->nrd_controlled)
79 mode |= HSMC_BIT(READ_MODE);
80 if (config->nwe_controlled)
81 mode |= HSMC_BIT(WRITE_MODE);
82 if (config->byte_write)
83 mode |= HSMC_BIT(BAT);
84
85 pr_debug("smc cs%d: setup/%08x pulse/%08x cycle/%08x mode/%08x\n",
86 cs, setup, pulse, cycle, mode);
87
88 offset = cs * 0x10;
89 hsmc_writel(hsmc, SETUP0 + offset, setup);
90 hsmc_writel(hsmc, PULSE0 + offset, pulse);
91 hsmc_writel(hsmc, CYCLE0 + offset, cycle);
92 hsmc_writel(hsmc, MODE0 + offset, mode);
93 hsmc_readl(hsmc, MODE0); /* I/O barrier */
94
95 return 0;
96}
97EXPORT_SYMBOL(smc_set_configuration);
98
99static int hsmc_probe(struct platform_device *pdev)
100{
101 struct resource *regs;
102 struct clk *pclk, *mck;
103 int ret;
104
105 if (hsmc)
106 return -EBUSY;
107
108 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
109 if (!regs)
110 return -ENXIO;
111 pclk = clk_get(&pdev->dev, "pclk");
112 if (IS_ERR(pclk))
113 return PTR_ERR(pclk);
114 mck = clk_get(&pdev->dev, "mck");
115 if (IS_ERR(mck)) {
116 ret = PTR_ERR(mck);
117 goto out_put_pclk;
118 }
119
120 ret = -ENOMEM;
121 hsmc = kzalloc(sizeof(struct hsmc), GFP_KERNEL);
122 if (!hsmc)
123 goto out_put_clocks;
124
125 clk_enable(pclk);
126 clk_enable(mck);
127
128 hsmc->pclk = pclk;
129 hsmc->mck = mck;
130 hsmc->regs = ioremap(regs->start, regs->end - regs->start + 1);
131 if (!hsmc->regs)
132 goto out_disable_clocks;
133
134 dev_info(&pdev->dev, "Atmel Static Memory Controller at 0x%08lx\n",
135 (unsigned long)regs->start);
136
137 platform_set_drvdata(pdev, hsmc);
138
139 return 0;
140
141out_disable_clocks:
142 clk_disable(mck);
143 clk_disable(pclk);
144 kfree(hsmc);
145out_put_clocks:
146 clk_put(mck);
147out_put_pclk:
148 clk_put(pclk);
149 hsmc = NULL;
150 return ret;
151}
152
153static struct platform_driver hsmc_driver = {
154 .probe = hsmc_probe,
155 .driver = {
156 .name = "smc",
157 },
158};
159
160static int __init hsmc_init(void)
161{
162 return platform_driver_register(&hsmc_driver);
163}
164arch_initcall(hsmc_init);
diff --git a/arch/avr32/mach-at32ap/hsmc.h b/arch/avr32/mach-at32ap/hsmc.h
new file mode 100644
index 000000000000..5681276fafdb
--- /dev/null
+++ b/arch/avr32/mach-at32ap/hsmc.h
@@ -0,0 +1,127 @@
1/*
2 * Register definitions for Atmel Static Memory Controller (SMC)
3 *
4 * Copyright (C) 2006 Atmel Corporation
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10#ifndef __ASM_AVR32_HSMC_H__
11#define __ASM_AVR32_HSMC_H__
12
13/* HSMC register offsets */
14#define HSMC_SETUP0 0x0000
15#define HSMC_PULSE0 0x0004
16#define HSMC_CYCLE0 0x0008
17#define HSMC_MODE0 0x000c
18#define HSMC_SETUP1 0x0010
19#define HSMC_PULSE1 0x0014
20#define HSMC_CYCLE1 0x0018
21#define HSMC_MODE1 0x001c
22#define HSMC_SETUP2 0x0020
23#define HSMC_PULSE2 0x0024
24#define HSMC_CYCLE2 0x0028
25#define HSMC_MODE2 0x002c
26#define HSMC_SETUP3 0x0030
27#define HSMC_PULSE3 0x0034
28#define HSMC_CYCLE3 0x0038
29#define HSMC_MODE3 0x003c
30#define HSMC_SETUP4 0x0040
31#define HSMC_PULSE4 0x0044
32#define HSMC_CYCLE4 0x0048
33#define HSMC_MODE4 0x004c
34#define HSMC_SETUP5 0x0050
35#define HSMC_PULSE5 0x0054
36#define HSMC_CYCLE5 0x0058
37#define HSMC_MODE5 0x005c
38
39/* Bitfields in SETUP0 */
40#define HSMC_NWE_SETUP_OFFSET 0
41#define HSMC_NWE_SETUP_SIZE 6
42#define HSMC_NCS_WR_SETUP_OFFSET 8
43#define HSMC_NCS_WR_SETUP_SIZE 6
44#define HSMC_NRD_SETUP_OFFSET 16
45#define HSMC_NRD_SETUP_SIZE 6
46#define HSMC_NCS_RD_SETUP_OFFSET 24
47#define HSMC_NCS_RD_SETUP_SIZE 6
48
49/* Bitfields in PULSE0 */
50#define HSMC_NWE_PULSE_OFFSET 0
51#define HSMC_NWE_PULSE_SIZE 7
52#define HSMC_NCS_WR_PULSE_OFFSET 8
53#define HSMC_NCS_WR_PULSE_SIZE 7
54#define HSMC_NRD_PULSE_OFFSET 16
55#define HSMC_NRD_PULSE_SIZE 7
56#define HSMC_NCS_RD_PULSE_OFFSET 24
57#define HSMC_NCS_RD_PULSE_SIZE 7
58
59/* Bitfields in CYCLE0 */
60#define HSMC_NWE_CYCLE_OFFSET 0
61#define HSMC_NWE_CYCLE_SIZE 9
62#define HSMC_NRD_CYCLE_OFFSET 16
63#define HSMC_NRD_CYCLE_SIZE 9
64
65/* Bitfields in MODE0 */
66#define HSMC_READ_MODE_OFFSET 0
67#define HSMC_READ_MODE_SIZE 1
68#define HSMC_WRITE_MODE_OFFSET 1
69#define HSMC_WRITE_MODE_SIZE 1
70#define HSMC_EXNW_MODE_OFFSET 4
71#define HSMC_EXNW_MODE_SIZE 2
72#define HSMC_BAT_OFFSET 8
73#define HSMC_BAT_SIZE 1
74#define HSMC_DBW_OFFSET 12
75#define HSMC_DBW_SIZE 2
76#define HSMC_TDF_CYCLES_OFFSET 16
77#define HSMC_TDF_CYCLES_SIZE 4
78#define HSMC_TDF_MODE_OFFSET 20
79#define HSMC_TDF_MODE_SIZE 1
80#define HSMC_PMEN_OFFSET 24
81#define HSMC_PMEN_SIZE 1
82#define HSMC_PS_OFFSET 28
83#define HSMC_PS_SIZE 2
84
85/* Constants for READ_MODE */
86#define HSMC_READ_MODE_NCS_CONTROLLED 0
87#define HSMC_READ_MODE_NRD_CONTROLLED 1
88
89/* Constants for WRITE_MODE */
90#define HSMC_WRITE_MODE_NCS_CONTROLLED 0
91#define HSMC_WRITE_MODE_NWE_CONTROLLED 1
92
93/* Constants for EXNW_MODE */
94#define HSMC_EXNW_MODE_DISABLED 0
95#define HSMC_EXNW_MODE_RESERVED 1
96#define HSMC_EXNW_MODE_FROZEN 2
97#define HSMC_EXNW_MODE_READY 3
98
99/* Constants for BAT */
100#define HSMC_BAT_BYTE_SELECT 0
101#define HSMC_BAT_BYTE_WRITE 1
102
103/* Constants for DBW */
104#define HSMC_DBW_8_BITS 0
105#define HSMC_DBW_16_BITS 1
106#define HSMC_DBW_32_BITS 2
107
108/* Bit manipulation macros */
109#define HSMC_BIT(name) \
110 (1 << HSMC_##name##_OFFSET)
111#define HSMC_BF(name,value) \
112 (((value) & ((1 << HSMC_##name##_SIZE) - 1)) \
113 << HSMC_##name##_OFFSET)
114#define HSMC_BFEXT(name,value) \
115 (((value) >> HSMC_##name##_OFFSET) \
116 & ((1 << HSMC_##name##_SIZE) - 1))
117#define HSMC_BFINS(name,value,old) \
118 (((old) & ~(((1 << HSMC_##name##_SIZE) - 1) \
119 << HSMC_##name##_OFFSET)) | HSMC_BF(name,value))
120
121/* Register access macros */
122#define hsmc_readl(port,reg) \
123 readl((port)->regs + HSMC_##reg)
124#define hsmc_writel(port,reg,value) \
125 writel((value), (port)->regs + HSMC_##reg)
126
127#endif /* __ASM_AVR32_HSMC_H__ */
diff --git a/include/asm-avr32/arch-at32ap/smc.h b/include/asm-avr32/arch-at32ap/smc.h
new file mode 100644
index 000000000000..3732b328303d
--- /dev/null
+++ b/include/asm-avr32/arch-at32ap/smc.h
@@ -0,0 +1,60 @@
1/*
2 * Static Memory Controller for AT32 chips
3 *
4 * Copyright (C) 2006 Atmel Corporation
5 *
6 * Inspired by the OMAP2 General-Purpose Memory Controller interface
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12#ifndef __ARCH_AT32AP_SMC_H
13#define __ARCH_AT32AP_SMC_H
14
15/*
16 * All timing parameters are in nanoseconds.
17 */
18struct smc_config {
19 /* Delay from address valid to assertion of given strobe */
20 u16 ncs_read_setup;
21 u16 nrd_setup;
22 u16 ncs_write_setup;
23 u16 nwe_setup;
24
25 /* Pulse length of given strobe */
26 u16 ncs_read_pulse;
27 u16 nrd_pulse;
28 u16 ncs_write_pulse;
29 u16 nwe_pulse;
30
31 /* Total cycle length of given operation */
32 u16 read_cycle;
33 u16 write_cycle;
34
35 /* Bus width in bytes */
36 u8 bus_width;
37
38 /*
39 * 0: Data is sampled on rising edge of NCS
40 * 1: Data is sampled on rising edge of NRD
41 */
42 unsigned int nrd_controlled:1;
43
44 /*
45 * 0: Data is driven on falling edge of NCS
46 * 1: Data is driven on falling edge of NWR
47 */
48 unsigned int nwe_controlled:1;
49
50 /*
51 * 0: Byte select access type
52 * 1: Byte write access type
53 */
54 unsigned int byte_write:1;
55};
56
57extern int smc_set_configuration(int cs, const struct smc_config *config);
58extern struct smc_config *smc_get_configuration(int cs);
59
60#endif /* __ARCH_AT32AP_SMC_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-09 08:34:48 -0400