2 * linux/arch/arm/mach-integrator/integrator_ap.c
4 * Copyright (C) 2000-2003 Deep Blue Solutions Ltd
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #include <linux/kernel.h>
21 #include <linux/init.h>
22 #include <linux/syscore_ops.h>
23 #include <linux/amba/bus.h>
25 #include <linux/irqchip.h>
26 #include <linux/of_irq.h>
27 #include <linux/of_address.h>
28 #include <linux/of_platform.h>
29 #include <linux/termios.h>
31 #include <asm/mach/arch.h>
32 #include <asm/mach/map.h>
40 /* Base address to the AP system controller */
41 void __iomem *ap_syscon_base;
42 /* Base address to the external bus interface */
43 static void __iomem *ebi_base;
47 * All IO addresses are mapped onto VA 0xFFFx.xxxx, where x.xxxx
50 * Setup a VA for the Integrator interrupt controller (for header #0,
53 #define VA_IC_BASE __io_address(INTEGRATOR_IC_BASE)
57 * f1400000 14000000 Interrupt controller
58 * f1600000 16000000 UART 0
61 static struct map_desc ap_io_desc[] __initdata __maybe_unused = {
63 .virtual = IO_ADDRESS(INTEGRATOR_IC_BASE),
64 .pfn = __phys_to_pfn(INTEGRATOR_IC_BASE),
68 .virtual = IO_ADDRESS(INTEGRATOR_UART0_BASE),
69 .pfn = __phys_to_pfn(INTEGRATOR_UART0_BASE),
75 static void __init ap_map_io(void)
77 iotable_init(ap_io_desc, ARRAY_SIZE(ap_io_desc));
82 static unsigned long ic_irq_enable;
84 static int irq_suspend(void)
86 ic_irq_enable = readl(VA_IC_BASE + IRQ_ENABLE);
90 static void irq_resume(void)
92 /* disable all irq sources */
94 writel(-1, VA_IC_BASE + IRQ_ENABLE_CLEAR);
95 writel(-1, VA_IC_BASE + FIQ_ENABLE_CLEAR);
97 writel(ic_irq_enable, VA_IC_BASE + IRQ_ENABLE_SET);
100 #define irq_suspend NULL
101 #define irq_resume NULL
104 static struct syscore_ops irq_syscore_ops = {
105 .suspend = irq_suspend,
106 .resume = irq_resume,
109 static int __init irq_syscore_init(void)
111 register_syscore_ops(&irq_syscore_ops);
116 device_initcall(irq_syscore_init);
119 * For the PL010 found in the Integrator/AP some of the UART control is
120 * implemented in the system controller and accessed using a callback
123 static void integrator_uart_set_mctrl(struct amba_device *dev,
124 void __iomem *base, unsigned int mctrl)
126 unsigned int ctrls = 0, ctrlc = 0, rts_mask, dtr_mask;
127 u32 phybase = dev->res.start;
129 if (phybase == INTEGRATOR_UART0_BASE) {
139 if (mctrl & TIOCM_RTS)
144 if (mctrl & TIOCM_DTR)
149 __raw_writel(ctrls, ap_syscon_base + INTEGRATOR_SC_CTRLS_OFFSET);
150 __raw_writel(ctrlc, ap_syscon_base + INTEGRATOR_SC_CTRLC_OFFSET);
153 struct amba_pl010_data ap_uart_data = {
154 .set_mctrl = integrator_uart_set_mctrl,
157 void __init ap_init_early(void)
161 static void __init ap_init_irq_of(void)
167 /* For the Device Tree, add in the UART callbacks as AUXDATA */
168 static struct of_dev_auxdata ap_auxdata_lookup[] __initdata = {
169 OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART0_BASE,
170 "uart0", &ap_uart_data),
171 OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART1_BASE,
172 "uart1", &ap_uart_data),
176 static const struct of_device_id ap_syscon_match[] = {
177 { .compatible = "arm,integrator-ap-syscon"},
181 static const struct of_device_id ebi_match[] = {
182 { .compatible = "arm,external-bus-interface"},
186 static void __init ap_init_of(void)
188 unsigned long sc_dec;
189 struct device_node *syscon;
190 struct device_node *ebi;
193 syscon = of_find_matching_node(NULL, ap_syscon_match);
196 ebi = of_find_matching_node(NULL, ebi_match);
200 ap_syscon_base = of_iomap(syscon, 0);
203 ebi_base = of_iomap(ebi, 0);
207 of_platform_default_populate(NULL, ap_auxdata_lookup, NULL);
209 sc_dec = readl(ap_syscon_base + INTEGRATOR_SC_DEC_OFFSET);
210 for (i = 0; i < 4; i++) {
211 struct lm_device *lmdev;
213 if ((sc_dec & (16 << i)) == 0)
216 lmdev = kzalloc(sizeof(struct lm_device), GFP_KERNEL);
220 lmdev->resource.start = 0xc0000000 + 0x10000000 * i;
221 lmdev->resource.end = lmdev->resource.start + 0x0fffffff;
222 lmdev->resource.flags = IORESOURCE_MEM;
223 lmdev->irq = irq_of_parse_and_map(syscon, i);
226 lm_device_register(lmdev);
230 static const char * ap_dt_board_compat[] = {
235 DT_MACHINE_START(INTEGRATOR_AP_DT, "ARM Integrator/AP (Device Tree)")
236 .reserve = integrator_reserve,
238 .init_early = ap_init_early,
239 .init_irq = ap_init_irq_of,
240 .init_machine = ap_init_of,
241 .dt_compat = ap_dt_board_compat,