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Linux/arch/powerpc/platforms/85xx/ksi8560.c

  1 /*
  2  * Board setup routines for the Emerson KSI8560
  3  *
  4  * Author: Alexandr Smirnov <asmirnov@ru.mvista.com>
  5  *
  6  * Based on mpc85xx_ads.c maintained by Kumar Gala
  7  *
  8  * 2008 (c) MontaVista, Software, Inc.  This file is licensed under
  9  * the terms of the GNU General Public License version 2.  This program
 10  * is licensed "as is" without any warranty of any kind, whether express
 11  * or implied.
 12  *
 13  */
 14 
 15 #include <linux/stddef.h>
 16 #include <linux/kernel.h>
 17 #include <linux/pci.h>
 18 #include <linux/kdev_t.h>
 19 #include <linux/delay.h>
 20 #include <linux/seq_file.h>
 21 #include <linux/of_platform.h>
 22 
 23 #include <asm/time.h>
 24 #include <asm/machdep.h>
 25 #include <asm/pci-bridge.h>
 26 #include <asm/mpic.h>
 27 #include <mm/mmu_decl.h>
 28 #include <asm/udbg.h>
 29 #include <asm/prom.h>
 30 
 31 #include <sysdev/fsl_soc.h>
 32 #include <sysdev/fsl_pci.h>
 33 
 34 #include <asm/cpm2.h>
 35 #include <sysdev/cpm2_pic.h>
 36 
 37 #include "mpc85xx.h"
 38 
 39 #define KSI8560_CPLD_HVR                0x04 /* Hardware Version Register */
 40 #define KSI8560_CPLD_PVR                0x08 /* PLD Version Register */
 41 #define KSI8560_CPLD_RCR1               0x30 /* Reset Command Register 1 */
 42 
 43 #define KSI8560_CPLD_RCR1_CPUHR         0x80 /* CPU Hard Reset */
 44 
 45 static void __iomem *cpld_base = NULL;
 46 
 47 static void machine_restart(char *cmd)
 48 {
 49         if (cpld_base)
 50                 out_8(cpld_base + KSI8560_CPLD_RCR1, KSI8560_CPLD_RCR1_CPUHR);
 51         else
 52                 printk(KERN_ERR "Can't find CPLD base, hang forever\n");
 53 
 54         for (;;);
 55 }
 56 
 57 static void __init ksi8560_pic_init(void)
 58 {
 59         struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
 60                         0, 256, " OpenPIC  ");
 61         BUG_ON(mpic == NULL);
 62         mpic_init(mpic);
 63 
 64         mpc85xx_cpm2_pic_init();
 65 }
 66 
 67 #ifdef CONFIG_CPM2
 68 /*
 69  * Setup I/O ports
 70  */
 71 struct cpm_pin {
 72         int port, pin, flags;
 73 };
 74 
 75 static struct cpm_pin __initdata ksi8560_pins[] = {
 76         /* SCC1 */
 77         {3, 29, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 78         {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 79         {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 80 
 81         /* SCC2 */
 82         {3, 26, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 83         {3, 27, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 84         {3, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 85 
 86         /* FCC1 */
 87         {0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 88         {0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 89         {0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 90         {0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 91         {0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 92         {0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 93         {0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 94         {0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 95         {0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 96         {0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 97         {0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 98         {0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 99         {0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
100         {0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
101         {2, 23, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK9 */
102         {2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK10 */
103 
104 };
105 
106 static void __init init_ioports(void)
107 {
108         int i;
109 
110         for (i = 0; i < ARRAY_SIZE(ksi8560_pins); i++) {
111                 struct cpm_pin *pin = &ksi8560_pins[i];
112                 cpm2_set_pin(pin->port, pin->pin, pin->flags);
113         }
114 
115         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
116         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
117         cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_RX);
118         cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_TX);
119         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK9, CPM_CLK_RX);
120         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_TX);
121 }
122 #endif
123 
124 /*
125  * Setup the architecture
126  */
127 static void __init ksi8560_setup_arch(void)
128 {
129         struct device_node *cpld;
130 
131         cpld = of_find_compatible_node(NULL, NULL, "emerson,KSI8560-cpld");
132         if (cpld)
133                 cpld_base = of_iomap(cpld, 0);
134         else
135                 printk(KERN_ERR "Can't find CPLD in device tree\n");
136 
137         if (ppc_md.progress)
138                 ppc_md.progress("ksi8560_setup_arch()", 0);
139 
140 #ifdef CONFIG_CPM2
141         cpm2_reset();
142         init_ioports();
143 #endif
144 }
145 
146 static void ksi8560_show_cpuinfo(struct seq_file *m)
147 {
148         uint pvid, svid, phid1;
149 
150         pvid = mfspr(SPRN_PVR);
151         svid = mfspr(SPRN_SVR);
152 
153         seq_printf(m, "Vendor\t\t: Emerson Network Power\n");
154         seq_printf(m, "Board\t\t: KSI8560\n");
155 
156         if (cpld_base) {
157                 seq_printf(m, "Hardware rev\t: %d\n",
158                                         in_8(cpld_base + KSI8560_CPLD_HVR));
159                 seq_printf(m, "CPLD rev\t: %d\n",
160                                         in_8(cpld_base + KSI8560_CPLD_PVR));
161         } else
162                 seq_printf(m, "Unknown Hardware and CPLD revs\n");
163 
164         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
165         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
166 
167         /* Display cpu Pll setting */
168         phid1 = mfspr(SPRN_HID1);
169         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
170 }
171 
172 machine_device_initcall(ksi8560, mpc85xx_common_publish_devices);
173 
174 /*
175  * Called very early, device-tree isn't unflattened
176  */
177 static int __init ksi8560_probe(void)
178 {
179         unsigned long root = of_get_flat_dt_root();
180 
181         return of_flat_dt_is_compatible(root, "emerson,KSI8560");
182 }
183 
184 define_machine(ksi8560) {
185         .name                   = "KSI8560",
186         .probe                  = ksi8560_probe,
187         .setup_arch             = ksi8560_setup_arch,
188         .init_IRQ               = ksi8560_pic_init,
189         .show_cpuinfo           = ksi8560_show_cpuinfo,
190         .get_irq                = mpic_get_irq,
191         .restart                = machine_restart,
192         .calibrate_decr         = generic_calibrate_decr,
193 };
194 

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