/arch/arm/mach-integrator/integrator_ap.c
C | 341 lines | 241 code | 49 blank | 51 comment | 16 complexity | a4fd5fe87b2d726f9bf401d2cac6e3fe MD5 | raw file
- /*
- * linux/arch/arm/mach-integrator/integrator_ap.c
- *
- * Copyright (C) 2000-2003 Deep Blue Solutions Ltd
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <linux/init.h>
- #include <linux/list.h>
- #include <linux/platform_device.h>
- #include <linux/slab.h>
- #include <linux/string.h>
- #include <linux/syscore_ops.h>
- #include <linux/amba/bus.h>
- #include <linux/amba/kmi.h>
- #include <linux/io.h>
- #include <linux/irqchip.h>
- #include <linux/mtd/physmap.h>
- #include <linux/platform_data/clk-integrator.h>
- #include <linux/of_irq.h>
- #include <linux/of_address.h>
- #include <linux/of_platform.h>
- #include <linux/stat.h>
- #include <linux/termios.h>
- #include <asm/setup.h>
- #include <asm/param.h> /* HZ */
- #include <asm/mach-types.h>
- #include <asm/mach/arch.h>
- #include <asm/mach/irq.h>
- #include <asm/mach/map.h>
- #include <asm/mach/time.h>
- #include "hardware.h"
- #include "cm.h"
- #include "common.h"
- #include "pci_v3.h"
- #include "lm.h"
- /* Base address to the AP system controller */
- void __iomem *ap_syscon_base;
- /* Base address to the external bus interface */
- static void __iomem *ebi_base;
- /*
- * All IO addresses are mapped onto VA 0xFFFx.xxxx, where x.xxxx
- * is the (PA >> 12).
- *
- * Setup a VA for the Integrator interrupt controller (for header #0,
- * just for now).
- */
- #define VA_IC_BASE __io_address(INTEGRATOR_IC_BASE)
- /*
- * Logical Physical
- * ef000000 Cache flush
- * f1100000 11000000 System controller registers
- * f1300000 13000000 Counter/Timer
- * f1400000 14000000 Interrupt controller
- * f1600000 16000000 UART 0
- * f1700000 17000000 UART 1
- * f1a00000 1a000000 Debug LEDs
- * f1b00000 1b000000 GPIO
- */
- static struct map_desc ap_io_desc[] __initdata __maybe_unused = {
- {
- .virtual = IO_ADDRESS(INTEGRATOR_IC_BASE),
- .pfn = __phys_to_pfn(INTEGRATOR_IC_BASE),
- .length = SZ_4K,
- .type = MT_DEVICE
- }, {
- .virtual = IO_ADDRESS(INTEGRATOR_UART0_BASE),
- .pfn = __phys_to_pfn(INTEGRATOR_UART0_BASE),
- .length = SZ_4K,
- .type = MT_DEVICE
- }, {
- .virtual = IO_ADDRESS(INTEGRATOR_DBG_BASE),
- .pfn = __phys_to_pfn(INTEGRATOR_DBG_BASE),
- .length = SZ_4K,
- .type = MT_DEVICE
- }, {
- .virtual = IO_ADDRESS(INTEGRATOR_AP_GPIO_BASE),
- .pfn = __phys_to_pfn(INTEGRATOR_AP_GPIO_BASE),
- .length = SZ_4K,
- .type = MT_DEVICE
- }
- };
- static void __init ap_map_io(void)
- {
- iotable_init(ap_io_desc, ARRAY_SIZE(ap_io_desc));
- pci_v3_early_init();
- }
- #ifdef CONFIG_PM
- static unsigned long ic_irq_enable;
- static int irq_suspend(void)
- {
- ic_irq_enable = readl(VA_IC_BASE + IRQ_ENABLE);
- return 0;
- }
- static void irq_resume(void)
- {
- /* disable all irq sources */
- cm_clear_irqs();
- writel(-1, VA_IC_BASE + IRQ_ENABLE_CLEAR);
- writel(-1, VA_IC_BASE + FIQ_ENABLE_CLEAR);
- writel(ic_irq_enable, VA_IC_BASE + IRQ_ENABLE_SET);
- }
- #else
- #define irq_suspend NULL
- #define irq_resume NULL
- #endif
- static struct syscore_ops irq_syscore_ops = {
- .suspend = irq_suspend,
- .resume = irq_resume,
- };
- static int __init irq_syscore_init(void)
- {
- register_syscore_ops(&irq_syscore_ops);
- return 0;
- }
- device_initcall(irq_syscore_init);
- /*
- * Flash handling.
- */
- static int ap_flash_init(struct platform_device *dev)
- {
- u32 tmp;
- writel(INTEGRATOR_SC_CTRL_nFLVPPEN | INTEGRATOR_SC_CTRL_nFLWP,
- ap_syscon_base + INTEGRATOR_SC_CTRLC_OFFSET);
- tmp = readl(ebi_base + INTEGRATOR_EBI_CSR1_OFFSET) |
- INTEGRATOR_EBI_WRITE_ENABLE;
- writel(tmp, ebi_base + INTEGRATOR_EBI_CSR1_OFFSET);
- if (!(readl(ebi_base + INTEGRATOR_EBI_CSR1_OFFSET)
- & INTEGRATOR_EBI_WRITE_ENABLE)) {
- writel(0xa05f, ebi_base + INTEGRATOR_EBI_LOCK_OFFSET);
- writel(tmp, ebi_base + INTEGRATOR_EBI_CSR1_OFFSET);
- writel(0, ebi_base + INTEGRATOR_EBI_LOCK_OFFSET);
- }
- return 0;
- }
- static void ap_flash_exit(struct platform_device *dev)
- {
- u32 tmp;
- writel(INTEGRATOR_SC_CTRL_nFLVPPEN | INTEGRATOR_SC_CTRL_nFLWP,
- ap_syscon_base + INTEGRATOR_SC_CTRLC_OFFSET);
- tmp = readl(ebi_base + INTEGRATOR_EBI_CSR1_OFFSET) &
- ~INTEGRATOR_EBI_WRITE_ENABLE;
- writel(tmp, ebi_base + INTEGRATOR_EBI_CSR1_OFFSET);
- if (readl(ebi_base + INTEGRATOR_EBI_CSR1_OFFSET) &
- INTEGRATOR_EBI_WRITE_ENABLE) {
- writel(0xa05f, ebi_base + INTEGRATOR_EBI_LOCK_OFFSET);
- writel(tmp, ebi_base + INTEGRATOR_EBI_CSR1_OFFSET);
- writel(0, ebi_base + INTEGRATOR_EBI_LOCK_OFFSET);
- }
- }
- static void ap_flash_set_vpp(struct platform_device *pdev, int on)
- {
- if (on)
- writel(INTEGRATOR_SC_CTRL_nFLVPPEN,
- ap_syscon_base + INTEGRATOR_SC_CTRLS_OFFSET);
- else
- writel(INTEGRATOR_SC_CTRL_nFLVPPEN,
- ap_syscon_base + INTEGRATOR_SC_CTRLC_OFFSET);
- }
- static struct physmap_flash_data ap_flash_data = {
- .width = 4,
- .init = ap_flash_init,
- .exit = ap_flash_exit,
- .set_vpp = ap_flash_set_vpp,
- };
- /*
- * For the PL010 found in the Integrator/AP some of the UART control is
- * implemented in the system controller and accessed using a callback
- * from the driver.
- */
- static void integrator_uart_set_mctrl(struct amba_device *dev,
- void __iomem *base, unsigned int mctrl)
- {
- unsigned int ctrls = 0, ctrlc = 0, rts_mask, dtr_mask;
- u32 phybase = dev->res.start;
- if (phybase == INTEGRATOR_UART0_BASE) {
- /* UART0 */
- rts_mask = 1 << 4;
- dtr_mask = 1 << 5;
- } else {
- /* UART1 */
- rts_mask = 1 << 6;
- dtr_mask = 1 << 7;
- }
- if (mctrl & TIOCM_RTS)
- ctrlc |= rts_mask;
- else
- ctrls |= rts_mask;
- if (mctrl & TIOCM_DTR)
- ctrlc |= dtr_mask;
- else
- ctrls |= dtr_mask;
- __raw_writel(ctrls, ap_syscon_base + INTEGRATOR_SC_CTRLS_OFFSET);
- __raw_writel(ctrlc, ap_syscon_base + INTEGRATOR_SC_CTRLC_OFFSET);
- }
- struct amba_pl010_data ap_uart_data = {
- .set_mctrl = integrator_uart_set_mctrl,
- };
- void __init ap_init_early(void)
- {
- }
- static void __init ap_init_irq_of(void)
- {
- cm_init();
- irqchip_init();
- }
- /* For the Device Tree, add in the UART callbacks as AUXDATA */
- static struct of_dev_auxdata ap_auxdata_lookup[] __initdata = {
- OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_RTC_BASE,
- "rtc", NULL),
- OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART0_BASE,
- "uart0", &ap_uart_data),
- OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART1_BASE,
- "uart1", &ap_uart_data),
- OF_DEV_AUXDATA("arm,primecell", KMI0_BASE,
- "kmi0", NULL),
- OF_DEV_AUXDATA("arm,primecell", KMI1_BASE,
- "kmi1", NULL),
- OF_DEV_AUXDATA("cfi-flash", INTEGRATOR_FLASH_BASE,
- "physmap-flash", &ap_flash_data),
- { /* sentinel */ },
- };
- static const struct of_device_id ap_syscon_match[] = {
- { .compatible = "arm,integrator-ap-syscon"},
- { },
- };
- static const struct of_device_id ebi_match[] = {
- { .compatible = "arm,external-bus-interface"},
- { },
- };
- static void __init ap_init_of(void)
- {
- unsigned long sc_dec;
- struct device_node *syscon;
- struct device_node *ebi;
- int i;
- syscon = of_find_matching_node(NULL, ap_syscon_match);
- if (!syscon)
- return;
- ebi = of_find_matching_node(NULL, ebi_match);
- if (!ebi)
- return;
- ap_syscon_base = of_iomap(syscon, 0);
- if (!ap_syscon_base)
- return;
- ebi_base = of_iomap(ebi, 0);
- if (!ebi_base)
- return;
- of_platform_populate(NULL, of_default_bus_match_table,
- ap_auxdata_lookup, NULL);
- sc_dec = readl(ap_syscon_base + INTEGRATOR_SC_DEC_OFFSET);
- for (i = 0; i < 4; i++) {
- struct lm_device *lmdev;
- if ((sc_dec & (16 << i)) == 0)
- continue;
- lmdev = kzalloc(sizeof(struct lm_device), GFP_KERNEL);
- if (!lmdev)
- continue;
- lmdev->resource.start = 0xc0000000 + 0x10000000 * i;
- lmdev->resource.end = lmdev->resource.start + 0x0fffffff;
- lmdev->resource.flags = IORESOURCE_MEM;
- lmdev->irq = irq_of_parse_and_map(syscon, i);
- lmdev->id = i;
- lm_device_register(lmdev);
- }
- }
- static const char * ap_dt_board_compat[] = {
- "arm,integrator-ap",
- NULL,
- };
- DT_MACHINE_START(INTEGRATOR_AP_DT, "ARM Integrator/AP (Device Tree)")
- .reserve = integrator_reserve,
- .map_io = ap_map_io,
- .init_early = ap_init_early,
- .init_irq = ap_init_irq_of,
- .init_machine = ap_init_of,
- .dt_compat = ap_dt_board_compat,
- MACHINE_END