Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mach-integrator/core.c |
| 3 | * |
| 4 | * Copyright (C) 2000-2003 Deep Blue Solutions Ltd |
| 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 | #include <linux/types.h> |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/device.h> |
Arnd Bergmann | b434f5c | 2012-08-04 10:31:24 +0000 | [diff] [blame^] | 14 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/spinlock.h> |
| 16 | #include <linux/interrupt.h> |
Thomas Gleixner | a03d4d2 | 2006-07-01 22:32:32 +0100 | [diff] [blame] | 17 | #include <linux/irq.h> |
Russell King | 8d717a5 | 2010-05-22 19:47:18 +0100 | [diff] [blame] | 18 | #include <linux/memblock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/sched.h> |
Russell King | 20cf33e | 2005-06-18 10:15:46 +0100 | [diff] [blame] | 20 | #include <linux/smp.h> |
Russell King | fbb18a2 | 2006-03-26 23:13:39 +0100 | [diff] [blame] | 21 | #include <linux/termios.h> |
Russell King | a62c80e | 2006-01-07 13:52:45 +0000 | [diff] [blame] | 22 | #include <linux/amba/bus.h> |
Russell King | fbb18a2 | 2006-03-26 23:13:39 +0100 | [diff] [blame] | 23 | #include <linux/amba/serial.h> |
Russell King | fced80c | 2008-09-06 12:10:45 +0100 | [diff] [blame] | 24 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 26 | #include <mach/hardware.h> |
Russell King | a285edc | 2010-01-14 19:59:37 +0000 | [diff] [blame] | 27 | #include <mach/platform.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 28 | #include <mach/cm.h> |
Linus Walleij | 695436e | 2012-02-26 10:46:48 +0100 | [diff] [blame] | 29 | #include <mach/irqs.h> |
| 30 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <asm/leds.h> |
Linus Walleij | ee35887 | 2011-12-20 11:55:19 +0100 | [diff] [blame] | 32 | #include <asm/mach-types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <asm/mach/time.h> |
Russell King | 98c672c | 2010-05-22 18:18:57 +0100 | [diff] [blame] | 34 | #include <asm/pgtable.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Russell King | fbb18a2 | 2006-03-26 23:13:39 +0100 | [diff] [blame] | 36 | static struct amba_pl010_data integrator_uart_data; |
| 37 | |
Russell King | 2f64ccd | 2011-12-18 14:50:51 +0000 | [diff] [blame] | 38 | #define INTEGRATOR_RTC_IRQ { IRQ_RTCINT } |
| 39 | #define INTEGRATOR_UART0_IRQ { IRQ_UARTINT0 } |
| 40 | #define INTEGRATOR_UART1_IRQ { IRQ_UARTINT1 } |
| 41 | #define KMI0_IRQ { IRQ_KMIINT0 } |
| 42 | #define KMI1_IRQ { IRQ_KMIINT1 } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
Linus Walleij | d59fdcfc | 2012-06-11 00:14:15 +0200 | [diff] [blame] | 44 | static AMBA_APB_DEVICE(rtc, "rtc", 0, |
Russell King | 2f64ccd | 2011-12-18 14:50:51 +0000 | [diff] [blame] | 45 | INTEGRATOR_RTC_BASE, INTEGRATOR_RTC_IRQ, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
Linus Walleij | d59fdcfc | 2012-06-11 00:14:15 +0200 | [diff] [blame] | 47 | static AMBA_APB_DEVICE(uart0, "uart0", 0, |
Russell King | 2f64ccd | 2011-12-18 14:50:51 +0000 | [diff] [blame] | 48 | INTEGRATOR_UART0_BASE, INTEGRATOR_UART0_IRQ, &integrator_uart_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
Linus Walleij | d59fdcfc | 2012-06-11 00:14:15 +0200 | [diff] [blame] | 50 | static AMBA_APB_DEVICE(uart1, "uart1", 0, |
Russell King | 2f64ccd | 2011-12-18 14:50:51 +0000 | [diff] [blame] | 51 | INTEGRATOR_UART1_BASE, INTEGRATOR_UART1_IRQ, &integrator_uart_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Linus Walleij | d59fdcfc | 2012-06-11 00:14:15 +0200 | [diff] [blame] | 53 | static AMBA_APB_DEVICE(kmi0, "kmi0", 0, KMI0_BASE, KMI0_IRQ, NULL); |
| 54 | static AMBA_APB_DEVICE(kmi1, "kmi1", 0, KMI1_BASE, KMI1_IRQ, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
| 56 | static struct amba_device *amba_devs[] __initdata = { |
| 57 | &rtc_device, |
| 58 | &uart0_device, |
| 59 | &uart1_device, |
| 60 | &kmi0_device, |
| 61 | &kmi1_device, |
| 62 | }; |
| 63 | |
| 64 | static int __init integrator_init(void) |
| 65 | { |
| 66 | int i; |
| 67 | |
Linus Walleij | ee35887 | 2011-12-20 11:55:19 +0100 | [diff] [blame] | 68 | /* |
| 69 | * The Integrator/AP lacks necessary AMBA PrimeCell IDs, so we need to |
| 70 | * hard-code them. The Integator/CP and forward have proper cell IDs. |
| 71 | * Else we leave them undefined to the bus driver can autoprobe them. |
| 72 | */ |
| 73 | if (machine_is_integrator()) { |
| 74 | rtc_device.periphid = 0x00041030; |
| 75 | uart0_device.periphid = 0x00041010; |
| 76 | uart1_device.periphid = 0x00041010; |
| 77 | kmi0_device.periphid = 0x00041050; |
| 78 | kmi1_device.periphid = 0x00041050; |
| 79 | } |
| 80 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | for (i = 0; i < ARRAY_SIZE(amba_devs); i++) { |
| 82 | struct amba_device *d = amba_devs[i]; |
| 83 | amba_device_register(d, &iomem_resource); |
| 84 | } |
| 85 | |
| 86 | return 0; |
| 87 | } |
| 88 | |
| 89 | arch_initcall(integrator_init); |
| 90 | |
Russell King | fbb18a2 | 2006-03-26 23:13:39 +0100 | [diff] [blame] | 91 | /* |
| 92 | * On the Integrator platform, the port RTS and DTR are provided by |
| 93 | * bits in the following SC_CTRLS register bits: |
| 94 | * RTS DTR |
| 95 | * UART0 7 6 |
| 96 | * UART1 5 4 |
| 97 | */ |
Russell King | b830b9b | 2010-01-17 20:45:12 +0000 | [diff] [blame] | 98 | #define SC_CTRLC IO_ADDRESS(INTEGRATOR_SC_CTRLC) |
| 99 | #define SC_CTRLS IO_ADDRESS(INTEGRATOR_SC_CTRLS) |
Russell King | fbb18a2 | 2006-03-26 23:13:39 +0100 | [diff] [blame] | 100 | |
| 101 | static void integrator_uart_set_mctrl(struct amba_device *dev, void __iomem *base, unsigned int mctrl) |
| 102 | { |
| 103 | unsigned int ctrls = 0, ctrlc = 0, rts_mask, dtr_mask; |
| 104 | |
| 105 | if (dev == &uart0_device) { |
| 106 | rts_mask = 1 << 4; |
| 107 | dtr_mask = 1 << 5; |
| 108 | } else { |
| 109 | rts_mask = 1 << 6; |
| 110 | dtr_mask = 1 << 7; |
| 111 | } |
| 112 | |
| 113 | if (mctrl & TIOCM_RTS) |
| 114 | ctrlc |= rts_mask; |
| 115 | else |
| 116 | ctrls |= rts_mask; |
| 117 | |
| 118 | if (mctrl & TIOCM_DTR) |
| 119 | ctrlc |= dtr_mask; |
| 120 | else |
| 121 | ctrls |= dtr_mask; |
| 122 | |
| 123 | __raw_writel(ctrls, SC_CTRLS); |
| 124 | __raw_writel(ctrlc, SC_CTRLC); |
| 125 | } |
| 126 | |
| 127 | static struct amba_pl010_data integrator_uart_data = { |
| 128 | .set_mctrl = integrator_uart_set_mctrl, |
| 129 | }; |
| 130 | |
Russell King | b830b9b | 2010-01-17 20:45:12 +0000 | [diff] [blame] | 131 | #define CM_CTRL IO_ADDRESS(INTEGRATOR_HDR_CTRL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | |
Thomas Gleixner | bd31b85 | 2009-07-03 08:44:46 -0500 | [diff] [blame] | 133 | static DEFINE_RAW_SPINLOCK(cm_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | |
| 135 | /** |
| 136 | * cm_control - update the CM_CTRL register. |
| 137 | * @mask: bits to change |
| 138 | * @set: bits to set |
| 139 | */ |
| 140 | void cm_control(u32 mask, u32 set) |
| 141 | { |
| 142 | unsigned long flags; |
| 143 | u32 val; |
| 144 | |
Thomas Gleixner | bd31b85 | 2009-07-03 08:44:46 -0500 | [diff] [blame] | 145 | raw_spin_lock_irqsave(&cm_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | val = readl(CM_CTRL) & ~mask; |
| 147 | writel(val | set, CM_CTRL); |
Thomas Gleixner | bd31b85 | 2009-07-03 08:44:46 -0500 | [diff] [blame] | 148 | raw_spin_unlock_irqrestore(&cm_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | } |
| 150 | |
| 151 | EXPORT_SYMBOL(cm_control); |
Russell King | 98c672c | 2010-05-22 18:18:57 +0100 | [diff] [blame] | 152 | |
| 153 | /* |
| 154 | * We need to stop things allocating the low memory; ideally we need a |
| 155 | * better implementation of GFP_DMA which does not assume that DMA-able |
| 156 | * memory starts at zero. |
| 157 | */ |
| 158 | void __init integrator_reserve(void) |
| 159 | { |
Russell King | 8d717a5 | 2010-05-22 19:47:18 +0100 | [diff] [blame] | 160 | memblock_reserve(PHYS_OFFSET, __pa(swapper_pg_dir) - PHYS_OFFSET); |
Russell King | 98c672c | 2010-05-22 18:18:57 +0100 | [diff] [blame] | 161 | } |
Russell King | 6338b66 | 2011-11-03 19:54:37 +0000 | [diff] [blame] | 162 | |
| 163 | /* |
| 164 | * To reset, we hit the on-board reset register in the system FPGA |
| 165 | */ |
| 166 | void integrator_restart(char mode, const char *cmd) |
| 167 | { |
| 168 | cm_control(CM_CTRL_RESET, CM_CTRL_RESET); |
| 169 | } |