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>
30 #include <linux/mfd/syscon.h>
31 #include <linux/regmap.h>
33 #include <asm/mach/arch.h>
34 #include <asm/mach/map.h>
41 /* Regmap to the AP system controller */
42 static struct regmap *ap_syscon_map;
45 * All IO addresses are mapped onto VA 0xFFFx.xxxx, where x.xxxx
48 * Setup a VA for the Integrator interrupt controller (for header #0,
51 #define VA_IC_BASE __io_address(INTEGRATOR_IC_BASE)
55 * f1400000 14000000 Interrupt controller
56 * f1600000 16000000 UART 0
59 static struct map_desc ap_io_desc[] __initdata __maybe_unused = {
61 .virtual = IO_ADDRESS(INTEGRATOR_IC_BASE),
62 .pfn = __phys_to_pfn(INTEGRATOR_IC_BASE),
66 .virtual = IO_ADDRESS(INTEGRATOR_UART0_BASE),
67 .pfn = __phys_to_pfn(INTEGRATOR_UART0_BASE),
73 static void __init ap_map_io(void)
75 iotable_init(ap_io_desc, ARRAY_SIZE(ap_io_desc));
79 static unsigned long ic_irq_enable;
81 static int irq_suspend(void)
83 ic_irq_enable = readl(VA_IC_BASE + IRQ_ENABLE);
87 static void irq_resume(void)
89 /* disable all irq sources */
91 writel(-1, VA_IC_BASE + IRQ_ENABLE_CLEAR);
92 writel(-1, VA_IC_BASE + FIQ_ENABLE_CLEAR);
94 writel(ic_irq_enable, VA_IC_BASE + IRQ_ENABLE_SET);
97 #define irq_suspend NULL
98 #define irq_resume NULL
101 static struct syscore_ops irq_syscore_ops = {
102 .suspend = irq_suspend,
103 .resume = irq_resume,
106 static int __init irq_syscore_init(void)
108 register_syscore_ops(&irq_syscore_ops);
113 device_initcall(irq_syscore_init);
116 * For the PL010 found in the Integrator/AP some of the UART control is
117 * implemented in the system controller and accessed using a callback
120 static void integrator_uart_set_mctrl(struct amba_device *dev,
121 void __iomem *base, unsigned int mctrl)
123 unsigned int ctrls = 0, ctrlc = 0, rts_mask, dtr_mask;
124 u32 phybase = dev->res.start;
127 if (phybase == INTEGRATOR_UART0_BASE) {
137 if (mctrl & TIOCM_RTS)
142 if (mctrl & TIOCM_DTR)
147 ret = regmap_write(ap_syscon_map,
148 INTEGRATOR_SC_CTRLS_OFFSET,
151 pr_err("MODEM: unable to write PL010 UART CTRLS\n");
153 ret = regmap_write(ap_syscon_map,
154 INTEGRATOR_SC_CTRLC_OFFSET,
157 pr_err("MODEM: unable to write PL010 UART CRTLC\n");
160 struct amba_pl010_data ap_uart_data = {
161 .set_mctrl = integrator_uart_set_mctrl,
164 void __init ap_init_early(void)
168 static void __init ap_init_irq_of(void)
174 /* For the Device Tree, add in the UART callbacks as AUXDATA */
175 static struct of_dev_auxdata ap_auxdata_lookup[] __initdata = {
176 OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART0_BASE,
177 "uart0", &ap_uart_data),
178 OF_DEV_AUXDATA("arm,primecell", INTEGRATOR_UART1_BASE,
179 "uart1", &ap_uart_data),
183 static const struct of_device_id ap_syscon_match[] = {
184 { .compatible = "arm,integrator-ap-syscon"},
188 static void __init ap_init_of(void)
191 struct device_node *syscon;
195 of_platform_default_populate(NULL, ap_auxdata_lookup, NULL);
197 syscon = of_find_matching_node(NULL, ap_syscon_match);
200 ap_syscon_map = syscon_node_to_regmap(syscon);
201 if (IS_ERR(ap_syscon_map)) {
202 pr_crit("could not find Integrator/AP system controller\n");
206 ret = regmap_read(ap_syscon_map,
207 INTEGRATOR_SC_DEC_OFFSET,
210 pr_crit("could not read from Integrator/AP syscon\n");
214 for (i = 0; i < 4; i++) {
215 struct lm_device *lmdev;
217 if ((sc_dec & (16 << i)) == 0)
220 lmdev = kzalloc(sizeof(struct lm_device), GFP_KERNEL);
224 lmdev->resource.start = 0xc0000000 + 0x10000000 * i;
225 lmdev->resource.end = lmdev->resource.start + 0x0fffffff;
226 lmdev->resource.flags = IORESOURCE_MEM;
227 lmdev->irq = irq_of_parse_and_map(syscon, i);
230 lm_device_register(lmdev);
234 static const char * ap_dt_board_compat[] = {
239 DT_MACHINE_START(INTEGRATOR_AP_DT, "ARM Integrator/AP (Device Tree)")
240 .reserve = integrator_reserve,
242 .init_early = ap_init_early,
243 .init_irq = ap_init_irq_of,
244 .init_machine = ap_init_of,
245 .dt_compat = ap_dt_board_compat,