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Linux/arch/powerpc/platforms/8xx/ep88xc.c

  1 /*
  2  * Platform setup for the Embedded Planet EP88xC board
  3  *
  4  * Author: Scott Wood <scottwood@freescale.com>
  5  * Copyright 2007 Freescale Semiconductor, Inc.
  6  *
  7  * This file is licensed under the terms of the GNU General Public License
  8  * version 2. This program is licensed "as is" without any warranty of any
  9  * kind, whether express or implied.
 10  */
 11 
 12 #include <linux/init.h>
 13 #include <linux/of_address.h>
 14 #include <linux/of_fdt.h>
 15 #include <linux/of_platform.h>
 16 
 17 #include <asm/machdep.h>
 18 #include <asm/io.h>
 19 #include <asm/udbg.h>
 20 #include <asm/cpm1.h>
 21 
 22 #include "mpc8xx.h"
 23 
 24 struct cpm_pin {
 25         int port, pin, flags;
 26 };
 27 
 28 static struct cpm_pin ep88xc_pins[] = {
 29         /* SMC1 */
 30         {1, 24, CPM_PIN_INPUT}, /* RX */
 31         {1, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
 32 
 33         /* SCC2 */
 34         {0, 12, CPM_PIN_INPUT}, /* TX */
 35         {0, 13, CPM_PIN_INPUT}, /* RX */
 36         {2, 8, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CD */
 37         {2, 9, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CTS */
 38         {2, 14, CPM_PIN_INPUT}, /* RTS */
 39 
 40         /* MII1 */
 41         {0, 0, CPM_PIN_INPUT},
 42         {0, 1, CPM_PIN_INPUT},
 43         {0, 2, CPM_PIN_INPUT},
 44         {0, 3, CPM_PIN_INPUT},
 45         {0, 4, CPM_PIN_OUTPUT},
 46         {0, 10, CPM_PIN_OUTPUT},
 47         {0, 11, CPM_PIN_OUTPUT},
 48         {1, 19, CPM_PIN_INPUT},
 49         {1, 31, CPM_PIN_INPUT},
 50         {2, 12, CPM_PIN_INPUT},
 51         {2, 13, CPM_PIN_INPUT},
 52         {3, 8, CPM_PIN_INPUT},
 53         {4, 30, CPM_PIN_OUTPUT},
 54         {4, 31, CPM_PIN_OUTPUT},
 55 
 56         /* MII2 */
 57         {4, 14, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 58         {4, 15, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 59         {4, 16, CPM_PIN_OUTPUT},
 60         {4, 17, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 61         {4, 18, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 62         {4, 19, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 63         {4, 20, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 64         {4, 21, CPM_PIN_OUTPUT},
 65         {4, 22, CPM_PIN_OUTPUT},
 66         {4, 23, CPM_PIN_OUTPUT},
 67         {4, 24, CPM_PIN_OUTPUT},
 68         {4, 25, CPM_PIN_OUTPUT},
 69         {4, 26, CPM_PIN_OUTPUT},
 70         {4, 27, CPM_PIN_OUTPUT},
 71         {4, 28, CPM_PIN_OUTPUT},
 72         {4, 29, CPM_PIN_OUTPUT},
 73 
 74         /* USB */
 75         {0, 6, CPM_PIN_INPUT},  /* CLK2 */
 76         {0, 14, CPM_PIN_INPUT}, /* USBOE */
 77         {0, 15, CPM_PIN_INPUT}, /* USBRXD */
 78         {2, 6, CPM_PIN_OUTPUT}, /* USBTXN */
 79         {2, 7, CPM_PIN_OUTPUT}, /* USBTXP */
 80         {2, 10, CPM_PIN_INPUT}, /* USBRXN */
 81         {2, 11, CPM_PIN_INPUT}, /* USBRXP */
 82 
 83         /* Misc */
 84         {1, 26, CPM_PIN_INPUT}, /* BRGO2 */
 85         {1, 27, CPM_PIN_INPUT}, /* BRGO1 */
 86 };
 87 
 88 static void __init init_ioports(void)
 89 {
 90         int i;
 91 
 92         for (i = 0; i < ARRAY_SIZE(ep88xc_pins); i++) {
 93                 struct cpm_pin *pin = &ep88xc_pins[i];
 94                 cpm1_set_pin(pin->port, pin->pin, pin->flags);
 95         }
 96 
 97         cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);
 98         cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK2, CPM_CLK_TX); /* USB */
 99         cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK2, CPM_CLK_RX);
100         cpm1_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_TX);
101         cpm1_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_RX);
102 }
103 
104 static u8 __iomem *ep88xc_bcsr;
105 
106 #define BCSR7_SCC2_ENABLE 0x10
107 
108 #define BCSR8_PHY1_ENABLE 0x80
109 #define BCSR8_PHY1_POWER  0x40
110 #define BCSR8_PHY2_ENABLE 0x20
111 #define BCSR8_PHY2_POWER  0x10
112 
113 #define BCSR9_USB_ENABLE  0x80
114 #define BCSR9_USB_POWER   0x40
115 #define BCSR9_USB_HOST    0x20
116 #define BCSR9_USB_FULL_SPEED_TARGET 0x10
117 
118 static void __init ep88xc_setup_arch(void)
119 {
120         struct device_node *np;
121 
122         cpm_reset();
123         init_ioports();
124 
125         np = of_find_compatible_node(NULL, NULL, "fsl,ep88xc-bcsr");
126         if (!np) {
127                 printk(KERN_CRIT "Could not find fsl,ep88xc-bcsr node\n");
128                 return;
129         }
130 
131         ep88xc_bcsr = of_iomap(np, 0);
132         of_node_put(np);
133 
134         if (!ep88xc_bcsr) {
135                 printk(KERN_CRIT "Could not remap BCSR\n");
136                 return;
137         }
138 
139         setbits8(&ep88xc_bcsr[7], BCSR7_SCC2_ENABLE);
140         setbits8(&ep88xc_bcsr[8], BCSR8_PHY1_ENABLE | BCSR8_PHY1_POWER |
141                                   BCSR8_PHY2_ENABLE | BCSR8_PHY2_POWER);
142 }
143 
144 static int __init ep88xc_probe(void)
145 {
146         unsigned long root = of_get_flat_dt_root();
147         return of_flat_dt_is_compatible(root, "fsl,ep88xc");
148 }
149 
150 static struct of_device_id __initdata of_bus_ids[] = {
151         { .name = "soc", },
152         { .name = "cpm", },
153         { .name = "localbus", },
154         {},
155 };
156 
157 static int __init declare_of_platform_devices(void)
158 {
159         /* Publish the QE devices */
160         of_platform_bus_probe(NULL, of_bus_ids, NULL);
161 
162         return 0;
163 }
164 machine_device_initcall(ep88xc, declare_of_platform_devices);
165 
166 define_machine(ep88xc) {
167         .name = "Embedded Planet EP88xC",
168         .probe = ep88xc_probe,
169         .setup_arch = ep88xc_setup_arch,
170         .init_IRQ = mpc8xx_pics_init,
171         .get_irq        = mpc8xx_get_irq,
172         .restart = mpc8xx_restart,
173         .calibrate_decr = mpc8xx_calibrate_decr,
174         .set_rtc_time = mpc8xx_set_rtc_time,
175         .get_rtc_time = mpc8xx_get_rtc_time,
176         .progress = udbg_progress,
177 };
178 

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