aboutsummaryrefslogtreecommitdiffstats
path: root/arch/powerpc
diff options
context:
space:
mode:
authorAndy Fleming <afleming@freescale.com>2006-08-17 21:24:48 -0400
committerPaul Mackerras <paulus@samba.org>2006-08-23 01:51:18 -0400
commitddd64159eb0d090766eee79b191a974ffdd83a42 (patch)
tree004015a1fd7b0994ad5196d8642545e55ac7e287 /arch/powerpc
parent4c86cd9c59428a40233fb707f5de18caa5ab5cb7 (diff)
[POWERPC] Fix CDS IRQ handling and PCI code
* Fix IRQ support in the 85xx CDS boards so it uses the new generic stuff * Fix PCI IRQ mapping to use the device tree * Disabled i8259 support to allow the CDS to boot. This will be fixed soon, but the current code doesn't even compile, so this is a vast improvement Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/platforms/85xx/Kconfig1
-rw-r--r--arch/powerpc/platforms/85xx/mpc85xx_cds.c210
2 files changed, 88 insertions, 123 deletions
diff --git a/arch/powerpc/platforms/85xx/Kconfig b/arch/powerpc/platforms/85xx/Kconfig
index 454fc53289ab..c3268d9877e4 100644
--- a/arch/powerpc/platforms/85xx/Kconfig
+++ b/arch/powerpc/platforms/85xx/Kconfig
@@ -14,7 +14,6 @@ config MPC8540_ADS
14config MPC85xx_CDS 14config MPC85xx_CDS
15 bool "Freescale MPC85xx CDS" 15 bool "Freescale MPC85xx CDS"
16 select DEFAULT_UIMAGE 16 select DEFAULT_UIMAGE
17 select PPC_I8259 if PCI
18 help 17 help
19 This option enables support for the MPC85xx CDS board 18 This option enables support for the MPC85xx CDS board
20 19
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_cds.c b/arch/powerpc/platforms/85xx/mpc85xx_cds.c
index 18e6e11f7020..1d357d32a29f 100644
--- a/arch/powerpc/platforms/85xx/mpc85xx_cds.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_cds.c
@@ -57,94 +57,8 @@ unsigned long isa_mem_base = 0;
57static int cds_pci_slot = 2; 57static int cds_pci_slot = 2;
58static volatile u8 *cadmus; 58static volatile u8 *cadmus;
59 59
60/*
61 * Internal interrupts are all Level Sensitive, and Positive Polarity
62 *
63 * Note: Likely, this table and the following function should be
64 * obtained and derived from the OF Device Tree.
65 */
66static u_char mpc85xx_cds_openpic_initsenses[] __initdata = {
67 MPC85XX_INTERNAL_IRQ_SENSES,
68#if defined(CONFIG_PCI)
69 (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* Ext 0: PCI slot 0 */
70 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext 1: PCI slot 1 */
71 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext 2: PCI slot 2 */
72 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext 3: PCI slot 3 */
73#else
74 0x0, /* External 0: */
75 0x0, /* External 1: */
76 0x0, /* External 2: */
77 0x0, /* External 3: */
78#endif
79 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* External 5: PHY */
80 0x0, /* External 6: */
81 0x0, /* External 7: */
82 0x0, /* External 8: */
83 0x0, /* External 9: */
84 0x0, /* External 10: */
85#ifdef CONFIG_PCI
86 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext 11: PCI2 slot 0 */
87#else
88 0x0, /* External 11: */
89#endif
90};
91
92 60
93#ifdef CONFIG_PCI 61#ifdef CONFIG_PCI
94/*
95 * interrupt routing
96 */
97int
98mpc85xx_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
99{
100 struct pci_controller *hose = pci_bus_to_hose(dev->bus->number);
101
102 if (!hose->index)
103 {
104 /* Handle PCI1 interrupts */
105 char pci_irq_table[][4] =
106 /*
107 * PCI IDSEL/INTPIN->INTLINE
108 * A B C D
109 */
110
111 /* Note IRQ assignment for slots is based on which slot the elysium is
112 * in -- in this setup elysium is in slot #2 (this PIRQA as first
113 * interrupt on slot */
114 {
115 { 0, 1, 2, 3 }, /* 16 - PMC */
116 { 0, 1, 2, 3 }, /* 17 P2P (Tsi320) */
117 { 0, 1, 2, 3 }, /* 18 - Slot 1 */
118 { 1, 2, 3, 0 }, /* 19 - Slot 2 */
119 { 2, 3, 0, 1 }, /* 20 - Slot 3 */
120 { 3, 0, 1, 2 }, /* 21 - Slot 4 */
121 };
122
123 const long min_idsel = 16, max_idsel = 21, irqs_per_slot = 4;
124 int i, j;
125
126 for (i = 0; i < 6; i++)
127 for (j = 0; j < 4; j++)
128 pci_irq_table[i][j] =
129 ((pci_irq_table[i][j] + 5 -
130 cds_pci_slot) & 0x3) + PIRQ0A;
131
132 return PCI_IRQ_TABLE_LOOKUP;
133 } else {
134 /* Handle PCI2 interrupts (if we have one) */
135 char pci_irq_table[][4] =
136 {
137 /*
138 * We only have one slot and one interrupt
139 * going to PIRQA - PIRQD */
140 { PIRQ1A, PIRQ1A, PIRQ1A, PIRQ1A }, /* 21 - slot 0 */
141 };
142
143 const long min_idsel = 21, max_idsel = 21, irqs_per_slot = 4;
144
145 return PCI_IRQ_TABLE_LOOKUP;
146 }
147}
148 62
149#define ARCADIA_HOST_BRIDGE_IDSEL 17 63#define ARCADIA_HOST_BRIDGE_IDSEL 17
150#define ARCADIA_2ND_BRIDGE_IDSEL 3 64#define ARCADIA_2ND_BRIDGE_IDSEL 3
@@ -210,50 +124,104 @@ mpc85xx_cds_pcibios_fixup(void)
210 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 11); 124 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 11);
211 pci_dev_put(dev); 125 pci_dev_put(dev);
212 } 126 }
127
128 /* Now map all the PCI irqs */
129 dev = NULL;
130 for_each_pci_dev(dev)
131 pci_read_irq_line(dev);
132}
133
134#ifdef CONFIG_PPC_I8259
135#warning The i8259 PIC support is currently broken
136static void mpc85xx_8259_cascade(unsigned int irq, struct
137 irq_desc *desc, struct pt_regs *regs)
138{
139 unsigned int cascade_irq = i8259_irq(regs);
140
141 if (cascade_irq != NO_IRQ)
142 generic_handle_irq(cascade_irq, regs);
143
144 desc->chip->eoi(irq);
213} 145}
146#endif /* PPC_I8259 */
214#endif /* CONFIG_PCI */ 147#endif /* CONFIG_PCI */
215 148
216void __init mpc85xx_cds_pic_init(void) 149void __init mpc85xx_cds_pic_init(void)
217{ 150{
218 struct mpic *mpic1; 151 struct mpic *mpic;
219 phys_addr_t OpenPIC_PAddr; 152 struct resource r;
153 struct device_node *np = NULL;
154 struct device_node *cascade_node = NULL;
155 int cascade_irq;
220 156
221 /* Determine the Physical Address of the OpenPIC regs */ 157 np = of_find_node_by_type(np, "open-pic");
222 OpenPIC_PAddr = get_immrbase() + MPC85xx_OPENPIC_OFFSET; 158
159 if (np == NULL) {
160 printk(KERN_ERR "Could not find open-pic node\n");
161 return;
162 }
223 163
224 mpic1 = mpic_alloc(OpenPIC_PAddr, 164 if (of_address_to_resource(np, 0, &r)) {
165 printk(KERN_ERR "Failed to map mpic register space\n");
166 of_node_put(np);
167 return;
168 }
169
170 mpic = mpic_alloc(np, r.start,
225 MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN, 171 MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
226 4, MPC85xx_OPENPIC_IRQ_OFFSET, 0, 250, 172 4, 0, " OpenPIC ");
227 mpc85xx_cds_openpic_initsenses, 173 BUG_ON(mpic == NULL);
228 sizeof(mpc85xx_cds_openpic_initsenses), " OpenPIC "); 174
229 BUG_ON(mpic1 == NULL); 175 /* Return the mpic node */
230 mpic_assign_isu(mpic1, 0, OpenPIC_PAddr + 0x10200); 176 of_node_put(np);
231 mpic_assign_isu(mpic1, 1, OpenPIC_PAddr + 0x10280); 177
232 mpic_assign_isu(mpic1, 2, OpenPIC_PAddr + 0x10300); 178 mpic_assign_isu(mpic, 0, r.start + 0x10200);
233 mpic_assign_isu(mpic1, 3, OpenPIC_PAddr + 0x10380); 179 mpic_assign_isu(mpic, 1, r.start + 0x10280);
234 mpic_assign_isu(mpic1, 4, OpenPIC_PAddr + 0x10400); 180 mpic_assign_isu(mpic, 2, r.start + 0x10300);
235 mpic_assign_isu(mpic1, 5, OpenPIC_PAddr + 0x10480); 181 mpic_assign_isu(mpic, 3, r.start + 0x10380);
236 mpic_assign_isu(mpic1, 6, OpenPIC_PAddr + 0x10500); 182 mpic_assign_isu(mpic, 4, r.start + 0x10400);
237 mpic_assign_isu(mpic1, 7, OpenPIC_PAddr + 0x10580); 183 mpic_assign_isu(mpic, 5, r.start + 0x10480);
238 184 mpic_assign_isu(mpic, 6, r.start + 0x10500);
239 /* dummy mappings to get to 48 */ 185 mpic_assign_isu(mpic, 7, r.start + 0x10580);
240 mpic_assign_isu(mpic1, 8, OpenPIC_PAddr + 0x10600); 186
241 mpic_assign_isu(mpic1, 9, OpenPIC_PAddr + 0x10680); 187 /* Used only for 8548 so far, but no harm in
242 mpic_assign_isu(mpic1, 10, OpenPIC_PAddr + 0x10700); 188 * allocating them for everyone */
243 mpic_assign_isu(mpic1, 11, OpenPIC_PAddr + 0x10780); 189 mpic_assign_isu(mpic, 8, r.start + 0x10600);
244 190 mpic_assign_isu(mpic, 9, r.start + 0x10680);
245 /* External ints */ 191 mpic_assign_isu(mpic, 10, r.start + 0x10700);
246 mpic_assign_isu(mpic1, 12, OpenPIC_PAddr + 0x10000); 192 mpic_assign_isu(mpic, 11, r.start + 0x10780);
247 mpic_assign_isu(mpic1, 13, OpenPIC_PAddr + 0x10080); 193
248 mpic_assign_isu(mpic1, 14, OpenPIC_PAddr + 0x10100); 194 /* External Interrupts */
249 195 mpic_assign_isu(mpic, 12, r.start + 0x10000);
250 mpic_init(mpic1); 196 mpic_assign_isu(mpic, 13, r.start + 0x10080);
197 mpic_assign_isu(mpic, 14, r.start + 0x10100);
198
199 mpic_init(mpic);
200
201#ifdef CONFIG_PPC_I8259
202 /* Initialize the i8259 controller */
203 for_each_node_by_type(np, "interrupt-controller")
204 if (device_is_compatible(np, "chrp,iic")) {
205 cascade_node = np;
206 break;
207 }
208
209 if (cascade_node == NULL) {
210 printk(KERN_DEBUG "Could not find i8259 PIC\n");
211 return;
212 }
251 213
252#ifdef CONFIG_PCI 214 cascade_irq = irq_of_parse_and_map(cascade_node, 0);
253 mpic_setup_cascade(PIRQ0A, i8259_irq_cascade, NULL); 215 if (cascade_irq == NO_IRQ) {
216 printk(KERN_ERR "Failed to map cascade interrupt\n");
217 return;
218 }
254 219
255 i8259_init(0,0); 220 i8259_init(cascade_node, 0);
256#endif 221 of_node_put(cascade_node);
222
223 set_irq_chained_handler(cascade_irq, mpc85xx_8259_cascade);
224#endif /* CONFIG_PPC_I8259 */
257} 225}
258 226
259 227
@@ -298,8 +266,6 @@ mpc85xx_cds_setup_arch(void)
298 add_bridge(np); 266 add_bridge(np);
299 267
300 ppc_md.pcibios_fixup = mpc85xx_cds_pcibios_fixup; 268 ppc_md.pcibios_fixup = mpc85xx_cds_pcibios_fixup;
301 ppc_md.pci_swizzle = common_swizzle;
302 ppc_md.pci_map_irq = mpc85xx_map_irq;
303 ppc_md.pci_exclude_device = mpc85xx_exclude_device; 269 ppc_md.pci_exclude_device = mpc85xx_exclude_device;
304#endif 270#endif
305 271
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-26 18:58:45 -0500