arch/arm/mach-mmp/pxa168.c

   1 /*
   2  *  linux/arch/arm/mach-mmp/pxa168.c
   3  *
   4  *  Code specific to PXA168
   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
  11 #include <linux/module.h>
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/list.h>
  15 #include <linux/io.h>
  16 #include <linux/clk.h>
  17
  18 #include <asm/mach/time.h>
  19 #include <mach/addr-map.h>
  20 #include <mach/cputype.h>
  21 #include <mach/regs-apbc.h>
  22 #include <mach/irqs.h>
  23 #include <mach/gpio.h>
  24 #include <mach/dma.h>
  25 #include <mach/devices.h>
  26 #include <mach/mfp.h>
  27
  28 #include "common.h"
  29 #include "clock.h"
  30
  31 #define MFPR_VIRT_BASE  (APB_VIRT_BASE + 0x1e000)
  32
  33 static struct mfp_addr_map pxa168_mfp_addr_map[] __initdata =
  34 {
  35         MFP_ADDR_X(GPIO0,   GPIO36,  0x04c),
  36         MFP_ADDR_X(GPIO37,  GPIO55,  0x000),
  37         MFP_ADDR_X(GPIO56,  GPIO123, 0x0e0),
  38         MFP_ADDR_X(GPIO124, GPIO127, 0x0f4),
  39
  40         MFP_ADDR_END,
  41 };
  42
  43 #define APMASK(i)       (GPIO_REGS_VIRT + BANK_OFF(i) + 0x09c)
  44
  45 static void __init pxa168_init_gpio(void)
  46 {
  47         int i;
  48
  49         /* enable GPIO clock */
  50         __raw_writel(APBC_APBCLK | APBC_FNCLK, APBC_PXA168_GPIO);
  51
  52         /* unmask GPIO edge detection for all 4 banks - APMASKx */
  53         for (i = 0; i < 4; i++)
  54                 __raw_writel(0xffffffff, APMASK(i));
  55
  56         pxa_init_gpio(IRQ_PXA168_GPIOX, 0, 127, NULL);
  57 }
  58
  59 void __init pxa168_init_irq(void)
  60 {
  61         icu_init_irq();
  62         pxa168_init_gpio();
  63 }
  64
  65 /* APB peripheral clocks */
  66 static APBC_CLK(uart1, PXA168_UART1, 1, 14745600);
  67 static APBC_CLK(uart2, PXA168_UART2, 1, 14745600);
  68
  69 /* device and clock bindings */
  70 static struct clk_lookup pxa168_clkregs[] = {
  71         INIT_CLKREG(&clk_uart1, "pxa2xx-uart.0", NULL),
  72         INIT_CLKREG(&clk_uart2, "pxa2xx-uart.1", NULL),
  73 };
  74
  75 static int __init pxa168_init(void)
  76 {
  77         if (cpu_is_pxa168()) {
  78                 mfp_init_base(MFPR_VIRT_BASE);
  79                 mfp_init_addr(pxa168_mfp_addr_map);
  80                 pxa_init_dma(IRQ_PXA168_DMA_INT0, 32);
  81                 clks_register(ARRAY_AND_SIZE(pxa168_clkregs));
  82         }
  83
  84         return 0;
  85 }
  86 postcore_initcall(pxa168_init);
  87
  88 /* system timer - clock enabled, 3.25MHz */
  89 #define TIMER_CLK_RST   (APBC_APBCLK | APBC_FNCLK | APBC_FNCLKSEL(3))
  90
  91 static void __init pxa168_timer_init(void)
  92 {
  93         /* this is early, we have to initialize the CCU registers by
  94          * ourselves instead of using clk_* API. Clock rate is defined
  95          * by APBC_TIMERS_CLK_RST (3.25MHz) and enabled free-running
  96          */
  97         __raw_writel(APBC_APBCLK | APBC_RST, APBC_PXA168_TIMERS);
  98
  99         /* 3.25MHz, bus/functional clock enabled, release reset */
 100         __raw_writel(TIMER_CLK_RST, APBC_PXA168_TIMERS);
 101
 102         timer_init(IRQ_PXA168_TIMER1);
 103 }
 104
 105 struct sys_timer pxa168_timer = {
 106         .init   = pxa168_timer_init,
 107 };
 108
 109 /* on-chip devices */
 110 PXA168_DEVICE(uart1, "pxa2xx-uart", 0, UART1, 0xd4017000, 0x30, 21, 22);
 111 PXA168_DEVICE(uart2, "pxa2xx-uart", 1, UART2, 0xd4018000, 0x30, 23, 24);