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Linux/arch/powerpc/platforms/82xx/km82xx.c

  1 /*
  2  * Keymile km82xx support
  3  * Copyright 2008-2011 DENX Software Engineering GmbH
  4  * Author: Heiko Schocher <hs@denx.de>
  5  *
  6  * based on code from:
  7  * Copyright 2007 Freescale Semiconductor, Inc.
  8  * Author: Scott Wood <scottwood@freescale.com>
  9  *
 10  * This program is free software; you can redistribute  it and/or modify it
 11  * under  the terms of  the GNU General  Public License as published by the
 12  * Free Software Foundation;  either version 2 of the  License, or (at your
 13  * option) any later version.
 14  */
 15 
 16 #include <linux/init.h>
 17 #include <linux/interrupt.h>
 18 #include <linux/fsl_devices.h>
 19 #include <linux/of_platform.h>
 20 
 21 #include <linux/io.h>
 22 #include <asm/cpm2.h>
 23 #include <asm/udbg.h>
 24 #include <asm/machdep.h>
 25 #include <linux/time.h>
 26 #include <asm/mpc8260.h>
 27 #include <asm/prom.h>
 28 
 29 #include <sysdev/fsl_soc.h>
 30 #include <sysdev/cpm2_pic.h>
 31 
 32 #include "pq2.h"
 33 
 34 static void __init km82xx_pic_init(void)
 35 {
 36         struct device_node *np = of_find_compatible_node(NULL, NULL,
 37                                                         "fsl,pq2-pic");
 38         if (!np) {
 39                 pr_err("PIC init: can not find cpm-pic node\n");
 40                 return;
 41         }
 42 
 43         cpm2_pic_init(np);
 44         of_node_put(np);
 45 }
 46 
 47 struct cpm_pin {
 48         int port, pin, flags;
 49 };
 50 
 51 static __initdata struct cpm_pin km82xx_pins[] = {
 52         /* SMC1 */
 53         {2, 4, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 54         {2, 5, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 55 
 56         /* SMC2 */
 57         {0, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 58         {0, 9, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 59 
 60         /* SCC1 */
 61         {2, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 62         {2, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 63         {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 64         {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 65 
 66         /* SCC4 */
 67         {2, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 68         {2, 24, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 69         {2,  9, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 70         {2,  8, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 71         {3, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 72         {3, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 73 
 74         /* FCC1 */
 75         {0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 76         {0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 77         {0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 78         {0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 79         {0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 80         {0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 81         {0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 82         {0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 83         {0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 84         {0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 85         {0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 86         {0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 87         {0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 88         {0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 89 
 90         {2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 91         {2, 23, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 92 
 93         /* FCC2 */
 94         {1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 95         {1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 96         {1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 97         {1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 98         {1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 99         {1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
100         {1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
101         {1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
102         {1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
103         {1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
104         {1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
105         {1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
106         {1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
107         {1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
108 
109         {2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
110         {2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
111 
112         /* MDC */
113         {0, 13, CPM_PIN_OUTPUT | CPM_PIN_GPIO},
114 
115 #if defined(CONFIG_I2C_CPM)
116         /* I2C */
117         {3, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
118         {3, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN},
119 #endif
120 
121         /* USB */
122         {0, 10, CPM_PIN_OUTPUT | CPM_PIN_GPIO},    /* FULL_SPEED */
123         {0, 11, CPM_PIN_OUTPUT | CPM_PIN_GPIO},    /*/SLAVE */
124         {2, 10, CPM_PIN_INPUT  | CPM_PIN_PRIMARY}, /* RXN */
125         {2, 11, CPM_PIN_INPUT  | CPM_PIN_PRIMARY}, /* RXP */
126         {2, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, /* /OE */
127         {2, 27, CPM_PIN_INPUT  | CPM_PIN_PRIMARY}, /* RXCLK */
128         {3, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, /* TXP */
129         {3, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, /* TXN */
130         {3, 25, CPM_PIN_INPUT  | CPM_PIN_PRIMARY}, /* RXD */
131 
132         /* SPI */
133         {3, 16, CPM_PIN_INPUT | CPM_PIN_SECONDARY},/* SPI_MISO PD16 */
134         {3, 17, CPM_PIN_INPUT | CPM_PIN_SECONDARY},/* SPI_MOSI PD17 */
135         {3, 18, CPM_PIN_INPUT | CPM_PIN_SECONDARY},/* SPI_CLK PD18 */
136 };
137 
138 static void __init init_ioports(void)
139 {
140         int i;
141 
142         for (i = 0; i < ARRAY_SIZE(km82xx_pins); i++) {
143                 const struct cpm_pin *pin = &km82xx_pins[i];
144                 cpm2_set_pin(pin->port, pin->pin, pin->flags);
145         }
146 
147         cpm2_smc_clk_setup(CPM_CLK_SMC2, CPM_BRG8);
148         cpm2_smc_clk_setup(CPM_CLK_SMC1, CPM_BRG7);
149         cpm2_clk_setup(CPM_CLK_SCC1, CPM_CLK11, CPM_CLK_RX);
150         cpm2_clk_setup(CPM_CLK_SCC1, CPM_CLK11, CPM_CLK_TX);
151         cpm2_clk_setup(CPM_CLK_SCC3, CPM_CLK5, CPM_CLK_RTX);
152         cpm2_clk_setup(CPM_CLK_SCC4, CPM_CLK7, CPM_CLK_RX);
153         cpm2_clk_setup(CPM_CLK_SCC4, CPM_CLK8, CPM_CLK_TX);
154         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_RX);
155         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK9,  CPM_CLK_TX);
156         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX);
157         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX);
158 
159         /* Force USB FULL SPEED bit to '1' */
160         setbits32(&cpm2_immr->im_ioport.iop_pdata, 1 << (31 - 10));
161         /* clear USB_SLAVE */
162         clrbits32(&cpm2_immr->im_ioport.iop_pdata, 1 << (31 - 11));
163 }
164 
165 static void __init km82xx_setup_arch(void)
166 {
167         if (ppc_md.progress)
168                 ppc_md.progress("km82xx_setup_arch()", 0);
169 
170         cpm2_reset();
171 
172         /* When this is set, snooping CPM DMA from RAM causes
173          * machine checks.  See erratum SIU18.
174          */
175         clrbits32(&cpm2_immr->im_siu_conf.siu_82xx.sc_bcr, MPC82XX_BCR_PLDP);
176 
177         init_ioports();
178 
179         if (ppc_md.progress)
180                 ppc_md.progress("km82xx_setup_arch(), finish", 0);
181 }
182 
183 static  __initdata struct of_device_id of_bus_ids[] = {
184         { .compatible = "simple-bus", },
185         {},
186 };
187 
188 static int __init declare_of_platform_devices(void)
189 {
190         of_platform_bus_probe(NULL, of_bus_ids, NULL);
191 
192         return 0;
193 }
194 machine_device_initcall(km82xx, declare_of_platform_devices);
195 
196 /*
197  * Called very early, device-tree isn't unflattened
198  */
199 static int __init km82xx_probe(void)
200 {
201         unsigned long root = of_get_flat_dt_root();
202         return of_flat_dt_is_compatible(root, "keymile,km82xx");
203 }
204 
205 define_machine(km82xx)
206 {
207         .name = "Keymile km82xx",
208         .probe = km82xx_probe,
209         .setup_arch = km82xx_setup_arch,
210         .init_IRQ = km82xx_pic_init,
211         .get_irq = cpm2_get_irq,
212         .calibrate_decr = generic_calibrate_decr,
213         .restart = pq2_restart,
214         .progress = udbg_progress,
215 };
216 

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