Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Shared interrupt handling code for IPR and INTC2 types of IRQs. |
| 3 | * |
Magnus Damm | d58876e | 2008-04-24 21:36:34 +0900 | [diff] [blame] | 4 | * Copyright (C) 2007, 2008 Magnus Damm |
Paul Mundt | 1ce7b03 | 2009-11-02 10:30:26 +0900 | [diff] [blame] | 5 | * Copyright (C) 2009 Paul Mundt |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 6 | * |
| 7 | * Based on intc2.c and ipr.c |
| 8 | * |
| 9 | * Copyright (C) 1999 Niibe Yutaka & Takeshi Yaegashi |
| 10 | * Copyright (C) 2000 Kazumoto Kojima |
| 11 | * Copyright (C) 2001 David J. Mckay (david.mckay@st.com) |
| 12 | * Copyright (C) 2003 Takashi Kusuda <kusuda-takashi@hitachi-ul.co.jp> |
| 13 | * Copyright (C) 2005, 2006 Paul Mundt |
| 14 | * |
| 15 | * This file is subject to the terms and conditions of the GNU General Public |
| 16 | * License. See the file "COPYING" in the main directory of this archive |
| 17 | * for more details. |
| 18 | */ |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/irq.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/io.h> |
| 23 | #include <linux/interrupt.h> |
Paul Mundt | bbfbd8b | 2008-10-01 16:13:54 +0900 | [diff] [blame] | 24 | #include <linux/sh_intc.h> |
Magnus Damm | 2dcec7a | 2009-04-01 14:30:59 +0000 | [diff] [blame] | 25 | #include <linux/sysdev.h> |
| 26 | #include <linux/list.h> |
Paul Mundt | 54ff328 | 2009-06-11 10:33:09 +0300 | [diff] [blame] | 27 | #include <linux/topology.h> |
Paul Mundt | 1ce7b03 | 2009-11-02 10:30:26 +0900 | [diff] [blame] | 28 | #include <linux/bitmap.h> |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 29 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 30 | #define _INTC_MK(fn, mode, addr_e, addr_d, width, shift) \ |
| 31 | ((shift) | ((width) << 5) | ((fn) << 9) | ((mode) << 13) | \ |
| 32 | ((addr_e) << 16) | ((addr_d << 24))) |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 33 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 34 | #define _INTC_SHIFT(h) (h & 0x1f) |
| 35 | #define _INTC_WIDTH(h) ((h >> 5) & 0xf) |
| 36 | #define _INTC_FN(h) ((h >> 9) & 0xf) |
| 37 | #define _INTC_MODE(h) ((h >> 13) & 0x7) |
| 38 | #define _INTC_ADDR_E(h) ((h >> 16) & 0xff) |
| 39 | #define _INTC_ADDR_D(h) ((h >> 24) & 0xff) |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 40 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 41 | struct intc_handle_int { |
| 42 | unsigned int irq; |
| 43 | unsigned long handle; |
| 44 | }; |
| 45 | |
| 46 | struct intc_desc_int { |
Magnus Damm | 2dcec7a | 2009-04-01 14:30:59 +0000 | [diff] [blame] | 47 | struct list_head list; |
| 48 | struct sys_device sysdev; |
Francesco VIRLINZI | 7fd87b3 | 2009-04-06 07:17:04 +0000 | [diff] [blame] | 49 | pm_message_t state; |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 50 | unsigned long *reg; |
Magnus Damm | f18d533 | 2007-09-21 18:16:42 +0900 | [diff] [blame] | 51 | #ifdef CONFIG_SMP |
| 52 | unsigned long *smp; |
| 53 | #endif |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 54 | unsigned int nr_reg; |
| 55 | struct intc_handle_int *prio; |
| 56 | unsigned int nr_prio; |
| 57 | struct intc_handle_int *sense; |
| 58 | unsigned int nr_sense; |
| 59 | struct irq_chip chip; |
| 60 | }; |
| 61 | |
Magnus Damm | 2dcec7a | 2009-04-01 14:30:59 +0000 | [diff] [blame] | 62 | static LIST_HEAD(intc_list); |
| 63 | |
Paul Mundt | 1ce7b03 | 2009-11-02 10:30:26 +0900 | [diff] [blame] | 64 | /* |
| 65 | * The intc_irq_map provides a global map of bound IRQ vectors for a |
| 66 | * given platform. Allocation of IRQs are either static through the CPU |
| 67 | * vector map, or dynamic in the case of board mux vectors or MSI. |
| 68 | * |
| 69 | * As this is a central point for all IRQ controllers on the system, |
| 70 | * each of the available sources are mapped out here. This combined with |
| 71 | * sparseirq makes it quite trivial to keep the vector map tightly packed |
| 72 | * when dynamically creating IRQs, as well as tying in to otherwise |
| 73 | * unused irq_desc positions in the sparse array. |
| 74 | */ |
| 75 | static DECLARE_BITMAP(intc_irq_map, NR_IRQS); |
| 76 | static DEFINE_SPINLOCK(vector_lock); |
| 77 | |
Magnus Damm | f18d533 | 2007-09-21 18:16:42 +0900 | [diff] [blame] | 78 | #ifdef CONFIG_SMP |
| 79 | #define IS_SMP(x) x.smp |
| 80 | #define INTC_REG(d, x, c) (d->reg[(x)] + ((d->smp[(x)] & 0xff) * c)) |
| 81 | #define SMP_NR(d, x) ((d->smp[(x)] >> 8) ? (d->smp[(x)] >> 8) : 1) |
| 82 | #else |
| 83 | #define IS_SMP(x) 0 |
| 84 | #define INTC_REG(d, x, c) (d->reg[(x)]) |
| 85 | #define SMP_NR(d, x) 1 |
| 86 | #endif |
| 87 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 88 | static unsigned int intc_prio_level[NR_IRQS]; /* for now */ |
Magnus Damm | d58876e | 2008-04-24 21:36:34 +0900 | [diff] [blame] | 89 | static unsigned long ack_handle[NR_IRQS]; |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 90 | |
| 91 | static inline struct intc_desc_int *get_intc_desc(unsigned int irq) |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 92 | { |
| 93 | struct irq_chip *chip = get_irq_chip(irq); |
Stuart Menefy | 6000fc4 | 2009-08-24 18:27:33 +0900 | [diff] [blame] | 94 | return container_of(chip, struct intc_desc_int, chip); |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | static inline unsigned int set_field(unsigned int value, |
| 98 | unsigned int field_value, |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 99 | unsigned int handle) |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 100 | { |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 101 | unsigned int width = _INTC_WIDTH(handle); |
| 102 | unsigned int shift = _INTC_SHIFT(handle); |
| 103 | |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 104 | value &= ~(((1 << width) - 1) << shift); |
| 105 | value |= field_value << shift; |
| 106 | return value; |
| 107 | } |
| 108 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 109 | static void write_8(unsigned long addr, unsigned long h, unsigned long data) |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 110 | { |
Paul Mundt | 62429e0 | 2008-10-01 15:19:10 +0900 | [diff] [blame] | 111 | __raw_writeb(set_field(0, data, h), addr); |
Stuart Menefy | 6000fc4 | 2009-08-24 18:27:33 +0900 | [diff] [blame] | 112 | (void)__raw_readb(addr); /* Defeat write posting */ |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 113 | } |
| 114 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 115 | static void write_16(unsigned long addr, unsigned long h, unsigned long data) |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 116 | { |
Paul Mundt | 62429e0 | 2008-10-01 15:19:10 +0900 | [diff] [blame] | 117 | __raw_writew(set_field(0, data, h), addr); |
Stuart Menefy | 6000fc4 | 2009-08-24 18:27:33 +0900 | [diff] [blame] | 118 | (void)__raw_readw(addr); /* Defeat write posting */ |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 119 | } |
| 120 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 121 | static void write_32(unsigned long addr, unsigned long h, unsigned long data) |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 122 | { |
Paul Mundt | 62429e0 | 2008-10-01 15:19:10 +0900 | [diff] [blame] | 123 | __raw_writel(set_field(0, data, h), addr); |
Stuart Menefy | 6000fc4 | 2009-08-24 18:27:33 +0900 | [diff] [blame] | 124 | (void)__raw_readl(addr); /* Defeat write posting */ |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 125 | } |
| 126 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 127 | static void modify_8(unsigned long addr, unsigned long h, unsigned long data) |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 128 | { |
Magnus Damm | 4370fe1 | 2008-04-24 21:53:07 +0900 | [diff] [blame] | 129 | unsigned long flags; |
| 130 | local_irq_save(flags); |
Paul Mundt | 62429e0 | 2008-10-01 15:19:10 +0900 | [diff] [blame] | 131 | __raw_writeb(set_field(__raw_readb(addr), data, h), addr); |
Stuart Menefy | 6000fc4 | 2009-08-24 18:27:33 +0900 | [diff] [blame] | 132 | (void)__raw_readb(addr); /* Defeat write posting */ |
Magnus Damm | 4370fe1 | 2008-04-24 21:53:07 +0900 | [diff] [blame] | 133 | local_irq_restore(flags); |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 134 | } |
| 135 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 136 | static void modify_16(unsigned long addr, unsigned long h, unsigned long data) |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 137 | { |
Magnus Damm | 4370fe1 | 2008-04-24 21:53:07 +0900 | [diff] [blame] | 138 | unsigned long flags; |
| 139 | local_irq_save(flags); |
Paul Mundt | 62429e0 | 2008-10-01 15:19:10 +0900 | [diff] [blame] | 140 | __raw_writew(set_field(__raw_readw(addr), data, h), addr); |
Stuart Menefy | 6000fc4 | 2009-08-24 18:27:33 +0900 | [diff] [blame] | 141 | (void)__raw_readw(addr); /* Defeat write posting */ |
Magnus Damm | 4370fe1 | 2008-04-24 21:53:07 +0900 | [diff] [blame] | 142 | local_irq_restore(flags); |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 143 | } |
| 144 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 145 | static void modify_32(unsigned long addr, unsigned long h, unsigned long data) |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 146 | { |
Magnus Damm | 4370fe1 | 2008-04-24 21:53:07 +0900 | [diff] [blame] | 147 | unsigned long flags; |
| 148 | local_irq_save(flags); |
Paul Mundt | 62429e0 | 2008-10-01 15:19:10 +0900 | [diff] [blame] | 149 | __raw_writel(set_field(__raw_readl(addr), data, h), addr); |
Stuart Menefy | 6000fc4 | 2009-08-24 18:27:33 +0900 | [diff] [blame] | 150 | (void)__raw_readl(addr); /* Defeat write posting */ |
Magnus Damm | 4370fe1 | 2008-04-24 21:53:07 +0900 | [diff] [blame] | 151 | local_irq_restore(flags); |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 152 | } |
| 153 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 154 | enum { REG_FN_ERR = 0, REG_FN_WRITE_BASE = 1, REG_FN_MODIFY_BASE = 5 }; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 155 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 156 | static void (*intc_reg_fns[])(unsigned long addr, |
| 157 | unsigned long h, |
| 158 | unsigned long data) = { |
| 159 | [REG_FN_WRITE_BASE + 0] = write_8, |
| 160 | [REG_FN_WRITE_BASE + 1] = write_16, |
| 161 | [REG_FN_WRITE_BASE + 3] = write_32, |
| 162 | [REG_FN_MODIFY_BASE + 0] = modify_8, |
| 163 | [REG_FN_MODIFY_BASE + 1] = modify_16, |
| 164 | [REG_FN_MODIFY_BASE + 3] = modify_32, |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 165 | }; |
| 166 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 167 | enum { MODE_ENABLE_REG = 0, /* Bit(s) set -> interrupt enabled */ |
| 168 | MODE_MASK_REG, /* Bit(s) set -> interrupt disabled */ |
| 169 | MODE_DUAL_REG, /* Two registers, set bit to enable / disable */ |
| 170 | MODE_PRIO_REG, /* Priority value written to enable interrupt */ |
| 171 | MODE_PCLR_REG, /* Above plus all bits set to disable interrupt */ |
| 172 | }; |
| 173 | |
| 174 | static void intc_mode_field(unsigned long addr, |
| 175 | unsigned long handle, |
| 176 | void (*fn)(unsigned long, |
| 177 | unsigned long, |
| 178 | unsigned long), |
| 179 | unsigned int irq) |
| 180 | { |
| 181 | fn(addr, handle, ((1 << _INTC_WIDTH(handle)) - 1)); |
| 182 | } |
| 183 | |
| 184 | static void intc_mode_zero(unsigned long addr, |
| 185 | unsigned long handle, |
| 186 | void (*fn)(unsigned long, |
| 187 | unsigned long, |
| 188 | unsigned long), |
| 189 | unsigned int irq) |
| 190 | { |
| 191 | fn(addr, handle, 0); |
| 192 | } |
| 193 | |
| 194 | static void intc_mode_prio(unsigned long addr, |
| 195 | unsigned long handle, |
| 196 | void (*fn)(unsigned long, |
| 197 | unsigned long, |
| 198 | unsigned long), |
| 199 | unsigned int irq) |
| 200 | { |
| 201 | fn(addr, handle, intc_prio_level[irq]); |
| 202 | } |
| 203 | |
| 204 | static void (*intc_enable_fns[])(unsigned long addr, |
| 205 | unsigned long handle, |
| 206 | void (*fn)(unsigned long, |
| 207 | unsigned long, |
| 208 | unsigned long), |
| 209 | unsigned int irq) = { |
| 210 | [MODE_ENABLE_REG] = intc_mode_field, |
| 211 | [MODE_MASK_REG] = intc_mode_zero, |
| 212 | [MODE_DUAL_REG] = intc_mode_field, |
| 213 | [MODE_PRIO_REG] = intc_mode_prio, |
| 214 | [MODE_PCLR_REG] = intc_mode_prio, |
| 215 | }; |
| 216 | |
| 217 | static void (*intc_disable_fns[])(unsigned long addr, |
| 218 | unsigned long handle, |
| 219 | void (*fn)(unsigned long, |
| 220 | unsigned long, |
| 221 | unsigned long), |
| 222 | unsigned int irq) = { |
| 223 | [MODE_ENABLE_REG] = intc_mode_zero, |
| 224 | [MODE_MASK_REG] = intc_mode_field, |
| 225 | [MODE_DUAL_REG] = intc_mode_field, |
| 226 | [MODE_PRIO_REG] = intc_mode_zero, |
| 227 | [MODE_PCLR_REG] = intc_mode_field, |
| 228 | }; |
| 229 | |
| 230 | static inline void _intc_enable(unsigned int irq, unsigned long handle) |
| 231 | { |
| 232 | struct intc_desc_int *d = get_intc_desc(irq); |
Magnus Damm | f18d533 | 2007-09-21 18:16:42 +0900 | [diff] [blame] | 233 | unsigned long addr; |
| 234 | unsigned int cpu; |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 235 | |
Magnus Damm | f18d533 | 2007-09-21 18:16:42 +0900 | [diff] [blame] | 236 | for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_E(handle)); cpu++) { |
| 237 | addr = INTC_REG(d, _INTC_ADDR_E(handle), cpu); |
| 238 | intc_enable_fns[_INTC_MODE(handle)](addr, handle, intc_reg_fns\ |
| 239 | [_INTC_FN(handle)], irq); |
| 240 | } |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 241 | } |
| 242 | |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 243 | static void intc_enable(unsigned int irq) |
| 244 | { |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 245 | _intc_enable(irq, (unsigned long)get_irq_chip_data(irq)); |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 246 | } |
| 247 | |
| 248 | static void intc_disable(unsigned int irq) |
| 249 | { |
Magnus Damm | f18d533 | 2007-09-21 18:16:42 +0900 | [diff] [blame] | 250 | struct intc_desc_int *d = get_intc_desc(irq); |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 251 | unsigned long handle = (unsigned long) get_irq_chip_data(irq); |
Magnus Damm | f18d533 | 2007-09-21 18:16:42 +0900 | [diff] [blame] | 252 | unsigned long addr; |
| 253 | unsigned int cpu; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 254 | |
Magnus Damm | f18d533 | 2007-09-21 18:16:42 +0900 | [diff] [blame] | 255 | for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_D(handle)); cpu++) { |
| 256 | addr = INTC_REG(d, _INTC_ADDR_D(handle), cpu); |
| 257 | intc_disable_fns[_INTC_MODE(handle)](addr, handle,intc_reg_fns\ |
| 258 | [_INTC_FN(handle)], irq); |
| 259 | } |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 260 | } |
| 261 | |
Magnus Damm | 2dcec7a | 2009-04-01 14:30:59 +0000 | [diff] [blame] | 262 | static int intc_set_wake(unsigned int irq, unsigned int on) |
| 263 | { |
| 264 | return 0; /* allow wakeup, but setup hardware in intc_suspend() */ |
| 265 | } |
| 266 | |
Magnus Damm | d58876e | 2008-04-24 21:36:34 +0900 | [diff] [blame] | 267 | static void intc_mask_ack(unsigned int irq) |
| 268 | { |
| 269 | struct intc_desc_int *d = get_intc_desc(irq); |
| 270 | unsigned long handle = ack_handle[irq]; |
| 271 | unsigned long addr; |
| 272 | |
| 273 | intc_disable(irq); |
| 274 | |
| 275 | /* read register and write zero only to the assocaited bit */ |
| 276 | |
| 277 | if (handle) { |
| 278 | addr = INTC_REG(d, _INTC_ADDR_D(handle), 0); |
Yoshihiro Shimoda | 6bdfb22 | 2008-07-04 12:37:12 +0900 | [diff] [blame] | 279 | switch (_INTC_FN(handle)) { |
| 280 | case REG_FN_MODIFY_BASE + 0: /* 8bit */ |
Paul Mundt | 62429e0 | 2008-10-01 15:19:10 +0900 | [diff] [blame] | 281 | __raw_readb(addr); |
| 282 | __raw_writeb(0xff ^ set_field(0, 1, handle), addr); |
Yoshihiro Shimoda | 6bdfb22 | 2008-07-04 12:37:12 +0900 | [diff] [blame] | 283 | break; |
| 284 | case REG_FN_MODIFY_BASE + 1: /* 16bit */ |
Paul Mundt | 62429e0 | 2008-10-01 15:19:10 +0900 | [diff] [blame] | 285 | __raw_readw(addr); |
| 286 | __raw_writew(0xffff ^ set_field(0, 1, handle), addr); |
Yoshihiro Shimoda | 6bdfb22 | 2008-07-04 12:37:12 +0900 | [diff] [blame] | 287 | break; |
| 288 | case REG_FN_MODIFY_BASE + 3: /* 32bit */ |
Paul Mundt | 62429e0 | 2008-10-01 15:19:10 +0900 | [diff] [blame] | 289 | __raw_readl(addr); |
| 290 | __raw_writel(0xffffffff ^ set_field(0, 1, handle), addr); |
Yoshihiro Shimoda | 6bdfb22 | 2008-07-04 12:37:12 +0900 | [diff] [blame] | 291 | break; |
| 292 | default: |
| 293 | BUG(); |
| 294 | break; |
| 295 | } |
Magnus Damm | d58876e | 2008-04-24 21:36:34 +0900 | [diff] [blame] | 296 | } |
| 297 | } |
Magnus Damm | d58876e | 2008-04-24 21:36:34 +0900 | [diff] [blame] | 298 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 299 | static struct intc_handle_int *intc_find_irq(struct intc_handle_int *hp, |
| 300 | unsigned int nr_hp, |
| 301 | unsigned int irq) |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 302 | { |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 303 | int i; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 304 | |
Magnus Damm | 3d37d94 | 2007-08-17 00:50:44 +0900 | [diff] [blame] | 305 | /* this doesn't scale well, but... |
| 306 | * |
| 307 | * this function should only be used for cerain uncommon |
| 308 | * operations such as intc_set_priority() and intc_set_sense() |
| 309 | * and in those rare cases performance doesn't matter that much. |
| 310 | * keeping the memory footprint low is more important. |
| 311 | * |
| 312 | * one rather simple way to speed this up and still keep the |
| 313 | * memory footprint down is to make sure the array is sorted |
| 314 | * and then perform a bisect to lookup the irq. |
| 315 | */ |
| 316 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 317 | for (i = 0; i < nr_hp; i++) { |
| 318 | if ((hp + i)->irq != irq) |
| 319 | continue; |
| 320 | |
| 321 | return hp + i; |
| 322 | } |
| 323 | |
| 324 | return NULL; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 325 | } |
| 326 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 327 | int intc_set_priority(unsigned int irq, unsigned int prio) |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 328 | { |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 329 | struct intc_desc_int *d = get_intc_desc(irq); |
| 330 | struct intc_handle_int *ihp; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 331 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 332 | if (!intc_prio_level[irq] || prio <= 1) |
| 333 | return -EINVAL; |
| 334 | |
| 335 | ihp = intc_find_irq(d->prio, d->nr_prio, irq); |
| 336 | if (ihp) { |
Magnus Damm | 3d37d94 | 2007-08-17 00:50:44 +0900 | [diff] [blame] | 337 | if (prio >= (1 << _INTC_WIDTH(ihp->handle))) |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 338 | return -EINVAL; |
| 339 | |
| 340 | intc_prio_level[irq] = prio; |
| 341 | |
| 342 | /* |
| 343 | * only set secondary masking method directly |
| 344 | * primary masking method is using intc_prio_level[irq] |
| 345 | * priority level will be set during next enable() |
| 346 | */ |
| 347 | |
Magnus Damm | 3d37d94 | 2007-08-17 00:50:44 +0900 | [diff] [blame] | 348 | if (_INTC_FN(ihp->handle) != REG_FN_ERR) |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 349 | _intc_enable(irq, ihp->handle); |
| 350 | } |
| 351 | return 0; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 352 | } |
| 353 | |
| 354 | #define VALID(x) (x | 0x80) |
| 355 | |
| 356 | static unsigned char intc_irq_sense_table[IRQ_TYPE_SENSE_MASK + 1] = { |
| 357 | [IRQ_TYPE_EDGE_FALLING] = VALID(0), |
| 358 | [IRQ_TYPE_EDGE_RISING] = VALID(1), |
| 359 | [IRQ_TYPE_LEVEL_LOW] = VALID(2), |
Magnus Damm | 720be99 | 2008-04-24 21:47:15 +0900 | [diff] [blame] | 360 | /* SH7706, SH7707 and SH7709 do not support high level triggered */ |
| 361 | #if !defined(CONFIG_CPU_SUBTYPE_SH7706) && \ |
| 362 | !defined(CONFIG_CPU_SUBTYPE_SH7707) && \ |
| 363 | !defined(CONFIG_CPU_SUBTYPE_SH7709) |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 364 | [IRQ_TYPE_LEVEL_HIGH] = VALID(3), |
Magnus Damm | 720be99 | 2008-04-24 21:47:15 +0900 | [diff] [blame] | 365 | #endif |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 366 | }; |
| 367 | |
| 368 | static int intc_set_sense(unsigned int irq, unsigned int type) |
| 369 | { |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 370 | struct intc_desc_int *d = get_intc_desc(irq); |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 371 | unsigned char value = intc_irq_sense_table[type & IRQ_TYPE_SENSE_MASK]; |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 372 | struct intc_handle_int *ihp; |
| 373 | unsigned long addr; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 374 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 375 | if (!value) |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 376 | return -EINVAL; |
| 377 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 378 | ihp = intc_find_irq(d->sense, d->nr_sense, irq); |
| 379 | if (ihp) { |
Magnus Damm | f18d533 | 2007-09-21 18:16:42 +0900 | [diff] [blame] | 380 | addr = INTC_REG(d, _INTC_ADDR_E(ihp->handle), 0); |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 381 | intc_reg_fns[_INTC_FN(ihp->handle)](addr, ihp->handle, value); |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 382 | } |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 383 | return 0; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 384 | } |
| 385 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 386 | static unsigned int __init intc_get_reg(struct intc_desc_int *d, |
| 387 | unsigned long address) |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 388 | { |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 389 | unsigned int k; |
| 390 | |
| 391 | for (k = 0; k < d->nr_reg; k++) { |
| 392 | if (d->reg[k] == address) |
| 393 | return k; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 394 | } |
| 395 | |
| 396 | BUG(); |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 397 | return 0; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 398 | } |
| 399 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 400 | static intc_enum __init intc_grp_id(struct intc_desc *desc, |
| 401 | intc_enum enum_id) |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 402 | { |
Magnus Damm | 680c459 | 2007-07-20 12:09:29 +0900 | [diff] [blame] | 403 | struct intc_group *g = desc->groups; |
| 404 | unsigned int i, j; |
| 405 | |
| 406 | for (i = 0; g && enum_id && i < desc->nr_groups; i++) { |
| 407 | g = desc->groups + i; |
| 408 | |
| 409 | for (j = 0; g->enum_ids[j]; j++) { |
| 410 | if (g->enum_ids[j] != enum_id) |
| 411 | continue; |
| 412 | |
| 413 | return g->enum_id; |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | return 0; |
| 418 | } |
| 419 | |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 420 | static unsigned int __init intc_mask_data(struct intc_desc *desc, |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 421 | struct intc_desc_int *d, |
Magnus Damm | 680c459 | 2007-07-20 12:09:29 +0900 | [diff] [blame] | 422 | intc_enum enum_id, int do_grps) |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 423 | { |
Magnus Damm | 680c459 | 2007-07-20 12:09:29 +0900 | [diff] [blame] | 424 | struct intc_mask_reg *mr = desc->mask_regs; |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 425 | unsigned int i, j, fn, mode; |
| 426 | unsigned long reg_e, reg_d; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 427 | |
Magnus Damm | 680c459 | 2007-07-20 12:09:29 +0900 | [diff] [blame] | 428 | for (i = 0; mr && enum_id && i < desc->nr_mask_regs; i++) { |
| 429 | mr = desc->mask_regs + i; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 430 | |
| 431 | for (j = 0; j < ARRAY_SIZE(mr->enum_ids); j++) { |
| 432 | if (mr->enum_ids[j] != enum_id) |
| 433 | continue; |
| 434 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 435 | if (mr->set_reg && mr->clr_reg) { |
| 436 | fn = REG_FN_WRITE_BASE; |
| 437 | mode = MODE_DUAL_REG; |
| 438 | reg_e = mr->clr_reg; |
| 439 | reg_d = mr->set_reg; |
| 440 | } else { |
| 441 | fn = REG_FN_MODIFY_BASE; |
| 442 | if (mr->set_reg) { |
| 443 | mode = MODE_ENABLE_REG; |
| 444 | reg_e = mr->set_reg; |
| 445 | reg_d = mr->set_reg; |
| 446 | } else { |
| 447 | mode = MODE_MASK_REG; |
| 448 | reg_e = mr->clr_reg; |
| 449 | reg_d = mr->clr_reg; |
| 450 | } |
Magnus Damm | 51da642 | 2007-08-03 14:25:32 +0900 | [diff] [blame] | 451 | } |
| 452 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 453 | fn += (mr->reg_width >> 3) - 1; |
| 454 | return _INTC_MK(fn, mode, |
| 455 | intc_get_reg(d, reg_e), |
| 456 | intc_get_reg(d, reg_d), |
| 457 | 1, |
| 458 | (mr->reg_width - 1) - j); |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 459 | } |
| 460 | } |
| 461 | |
Magnus Damm | 680c459 | 2007-07-20 12:09:29 +0900 | [diff] [blame] | 462 | if (do_grps) |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 463 | return intc_mask_data(desc, d, intc_grp_id(desc, enum_id), 0); |
Magnus Damm | 680c459 | 2007-07-20 12:09:29 +0900 | [diff] [blame] | 464 | |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 465 | return 0; |
| 466 | } |
| 467 | |
| 468 | static unsigned int __init intc_prio_data(struct intc_desc *desc, |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 469 | struct intc_desc_int *d, |
Magnus Damm | 680c459 | 2007-07-20 12:09:29 +0900 | [diff] [blame] | 470 | intc_enum enum_id, int do_grps) |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 471 | { |
Magnus Damm | 680c459 | 2007-07-20 12:09:29 +0900 | [diff] [blame] | 472 | struct intc_prio_reg *pr = desc->prio_regs; |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 473 | unsigned int i, j, fn, mode, bit; |
| 474 | unsigned long reg_e, reg_d; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 475 | |
Magnus Damm | 680c459 | 2007-07-20 12:09:29 +0900 | [diff] [blame] | 476 | for (i = 0; pr && enum_id && i < desc->nr_prio_regs; i++) { |
| 477 | pr = desc->prio_regs + i; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 478 | |
| 479 | for (j = 0; j < ARRAY_SIZE(pr->enum_ids); j++) { |
| 480 | if (pr->enum_ids[j] != enum_id) |
| 481 | continue; |
| 482 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 483 | if (pr->set_reg && pr->clr_reg) { |
| 484 | fn = REG_FN_WRITE_BASE; |
| 485 | mode = MODE_PCLR_REG; |
| 486 | reg_e = pr->set_reg; |
| 487 | reg_d = pr->clr_reg; |
| 488 | } else { |
| 489 | fn = REG_FN_MODIFY_BASE; |
| 490 | mode = MODE_PRIO_REG; |
| 491 | if (!pr->set_reg) |
| 492 | BUG(); |
| 493 | reg_e = pr->set_reg; |
| 494 | reg_d = pr->set_reg; |
| 495 | } |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 496 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 497 | fn += (pr->reg_width >> 3) - 1; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 498 | |
roel kluin | b21a910 | 2008-09-09 23:02:43 +0200 | [diff] [blame] | 499 | BUG_ON((j + 1) * pr->field_width > pr->reg_width); |
| 500 | |
| 501 | bit = pr->reg_width - ((j + 1) * pr->field_width); |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 502 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 503 | return _INTC_MK(fn, mode, |
| 504 | intc_get_reg(d, reg_e), |
| 505 | intc_get_reg(d, reg_d), |
| 506 | pr->field_width, bit); |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 507 | } |
| 508 | } |
| 509 | |
Magnus Damm | 680c459 | 2007-07-20 12:09:29 +0900 | [diff] [blame] | 510 | if (do_grps) |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 511 | return intc_prio_data(desc, d, intc_grp_id(desc, enum_id), 0); |
Magnus Damm | 680c459 | 2007-07-20 12:09:29 +0900 | [diff] [blame] | 512 | |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 513 | return 0; |
| 514 | } |
| 515 | |
Magnus Damm | d58876e | 2008-04-24 21:36:34 +0900 | [diff] [blame] | 516 | static unsigned int __init intc_ack_data(struct intc_desc *desc, |
| 517 | struct intc_desc_int *d, |
| 518 | intc_enum enum_id) |
| 519 | { |
| 520 | struct intc_mask_reg *mr = desc->ack_regs; |
| 521 | unsigned int i, j, fn, mode; |
| 522 | unsigned long reg_e, reg_d; |
| 523 | |
| 524 | for (i = 0; mr && enum_id && i < desc->nr_ack_regs; i++) { |
| 525 | mr = desc->ack_regs + i; |
| 526 | |
| 527 | for (j = 0; j < ARRAY_SIZE(mr->enum_ids); j++) { |
| 528 | if (mr->enum_ids[j] != enum_id) |
| 529 | continue; |
| 530 | |
| 531 | fn = REG_FN_MODIFY_BASE; |
| 532 | mode = MODE_ENABLE_REG; |
| 533 | reg_e = mr->set_reg; |
| 534 | reg_d = mr->set_reg; |
| 535 | |
| 536 | fn += (mr->reg_width >> 3) - 1; |
| 537 | return _INTC_MK(fn, mode, |
| 538 | intc_get_reg(d, reg_e), |
| 539 | intc_get_reg(d, reg_d), |
| 540 | 1, |
| 541 | (mr->reg_width - 1) - j); |
| 542 | } |
| 543 | } |
| 544 | |
| 545 | return 0; |
| 546 | } |
Magnus Damm | d58876e | 2008-04-24 21:36:34 +0900 | [diff] [blame] | 547 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 548 | static unsigned int __init intc_sense_data(struct intc_desc *desc, |
| 549 | struct intc_desc_int *d, |
| 550 | intc_enum enum_id) |
| 551 | { |
| 552 | struct intc_sense_reg *sr = desc->sense_regs; |
| 553 | unsigned int i, j, fn, bit; |
| 554 | |
| 555 | for (i = 0; sr && enum_id && i < desc->nr_sense_regs; i++) { |
| 556 | sr = desc->sense_regs + i; |
| 557 | |
| 558 | for (j = 0; j < ARRAY_SIZE(sr->enum_ids); j++) { |
| 559 | if (sr->enum_ids[j] != enum_id) |
| 560 | continue; |
| 561 | |
| 562 | fn = REG_FN_MODIFY_BASE; |
| 563 | fn += (sr->reg_width >> 3) - 1; |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 564 | |
roel kluin | b21a910 | 2008-09-09 23:02:43 +0200 | [diff] [blame] | 565 | BUG_ON((j + 1) * sr->field_width > sr->reg_width); |
| 566 | |
| 567 | bit = sr->reg_width - ((j + 1) * sr->field_width); |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 568 | |
| 569 | return _INTC_MK(fn, 0, intc_get_reg(d, sr->reg), |
| 570 | 0, sr->field_width, bit); |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | return 0; |
| 575 | } |
| 576 | |
| 577 | static void __init intc_register_irq(struct intc_desc *desc, |
| 578 | struct intc_desc_int *d, |
| 579 | intc_enum enum_id, |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 580 | unsigned int irq) |
| 581 | { |
Magnus Damm | 3d37d94 | 2007-08-17 00:50:44 +0900 | [diff] [blame] | 582 | struct intc_handle_int *hp; |
Magnus Damm | 680c459 | 2007-07-20 12:09:29 +0900 | [diff] [blame] | 583 | unsigned int data[2], primary; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 584 | |
Paul Mundt | 1ce7b03 | 2009-11-02 10:30:26 +0900 | [diff] [blame] | 585 | /* |
| 586 | * Register the IRQ position with the global IRQ map |
| 587 | */ |
| 588 | set_bit(irq, intc_irq_map); |
| 589 | |
Magnus Damm | 680c459 | 2007-07-20 12:09:29 +0900 | [diff] [blame] | 590 | /* Prefer single interrupt source bitmap over other combinations: |
| 591 | * 1. bitmap, single interrupt source |
| 592 | * 2. priority, single interrupt source |
| 593 | * 3. bitmap, multiple interrupt sources (groups) |
| 594 | * 4. priority, multiple interrupt sources (groups) |
| 595 | */ |
| 596 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 597 | data[0] = intc_mask_data(desc, d, enum_id, 0); |
| 598 | data[1] = intc_prio_data(desc, d, enum_id, 0); |
Magnus Damm | 680c459 | 2007-07-20 12:09:29 +0900 | [diff] [blame] | 599 | |
| 600 | primary = 0; |
| 601 | if (!data[0] && data[1]) |
| 602 | primary = 1; |
| 603 | |
Magnus Damm | bdaa6e8 | 2009-02-24 22:58:57 +0900 | [diff] [blame] | 604 | if (!data[0] && !data[1]) |
Paul Mundt | f033599 | 2009-03-06 17:56:58 +0900 | [diff] [blame] | 605 | pr_warning("intc: missing unique irq mask for " |
| 606 | "irq %d (vect 0x%04x)\n", irq, irq2evt(irq)); |
Magnus Damm | bdaa6e8 | 2009-02-24 22:58:57 +0900 | [diff] [blame] | 607 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 608 | data[0] = data[0] ? data[0] : intc_mask_data(desc, d, enum_id, 1); |
| 609 | data[1] = data[1] ? data[1] : intc_prio_data(desc, d, enum_id, 1); |
Magnus Damm | 680c459 | 2007-07-20 12:09:29 +0900 | [diff] [blame] | 610 | |
| 611 | if (!data[primary]) |
| 612 | primary ^= 1; |
| 613 | |
| 614 | BUG_ON(!data[primary]); /* must have primary masking method */ |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 615 | |
| 616 | disable_irq_nosync(irq); |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 617 | set_irq_chip_and_handler_name(irq, &d->chip, |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 618 | handle_level_irq, "level"); |
Magnus Damm | 680c459 | 2007-07-20 12:09:29 +0900 | [diff] [blame] | 619 | set_irq_chip_data(irq, (void *)data[primary]); |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 620 | |
Magnus Damm | 7f3edee | 2008-01-10 14:08:55 +0900 | [diff] [blame] | 621 | /* set priority level |
| 622 | * - this needs to be at least 2 for 5-bit priorities on 7780 |
| 623 | */ |
| 624 | intc_prio_level[irq] = 2; |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 625 | |
Magnus Damm | 680c459 | 2007-07-20 12:09:29 +0900 | [diff] [blame] | 626 | /* enable secondary masking method if present */ |
| 627 | if (data[!primary]) |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 628 | _intc_enable(irq, data[!primary]); |
| 629 | |
| 630 | /* add irq to d->prio list if priority is available */ |
| 631 | if (data[1]) { |
Magnus Damm | 3d37d94 | 2007-08-17 00:50:44 +0900 | [diff] [blame] | 632 | hp = d->prio + d->nr_prio; |
| 633 | hp->irq = irq; |
| 634 | hp->handle = data[1]; |
| 635 | |
| 636 | if (primary) { |
| 637 | /* |
| 638 | * only secondary priority should access registers, so |
| 639 | * set _INTC_FN(h) = REG_FN_ERR for intc_set_priority() |
| 640 | */ |
| 641 | |
| 642 | hp->handle &= ~_INTC_MK(0x0f, 0, 0, 0, 0, 0); |
| 643 | hp->handle |= _INTC_MK(REG_FN_ERR, 0, 0, 0, 0, 0); |
| 644 | } |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 645 | d->nr_prio++; |
| 646 | } |
| 647 | |
| 648 | /* add irq to d->sense list if sense is available */ |
| 649 | data[0] = intc_sense_data(desc, d, enum_id); |
| 650 | if (data[0]) { |
| 651 | (d->sense + d->nr_sense)->irq = irq; |
| 652 | (d->sense + d->nr_sense)->handle = data[0]; |
| 653 | d->nr_sense++; |
| 654 | } |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 655 | |
| 656 | /* irq should be disabled by default */ |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 657 | d->chip.mask(irq); |
Magnus Damm | d58876e | 2008-04-24 21:36:34 +0900 | [diff] [blame] | 658 | |
Magnus Damm | d58876e | 2008-04-24 21:36:34 +0900 | [diff] [blame] | 659 | if (desc->ack_regs) |
| 660 | ack_handle[irq] = intc_ack_data(desc, d, enum_id); |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 661 | } |
| 662 | |
Magnus Damm | f18d533 | 2007-09-21 18:16:42 +0900 | [diff] [blame] | 663 | static unsigned int __init save_reg(struct intc_desc_int *d, |
| 664 | unsigned int cnt, |
| 665 | unsigned long value, |
| 666 | unsigned int smp) |
| 667 | { |
| 668 | if (value) { |
| 669 | d->reg[cnt] = value; |
| 670 | #ifdef CONFIG_SMP |
| 671 | d->smp[cnt] = smp; |
| 672 | #endif |
| 673 | return 1; |
| 674 | } |
| 675 | |
| 676 | return 0; |
| 677 | } |
| 678 | |
Pawel Moll | 05ecd5a | 2009-08-24 19:52:38 +0900 | [diff] [blame] | 679 | static void intc_redirect_irq(unsigned int irq, struct irq_desc *desc) |
Magnus Damm | bdaa6e8 | 2009-02-24 22:58:57 +0900 | [diff] [blame] | 680 | { |
Pawel Moll | 05ecd5a | 2009-08-24 19:52:38 +0900 | [diff] [blame] | 681 | generic_handle_irq((unsigned int)get_irq_data(irq)); |
Magnus Damm | bdaa6e8 | 2009-02-24 22:58:57 +0900 | [diff] [blame] | 682 | } |
Magnus Damm | f18d533 | 2007-09-21 18:16:42 +0900 | [diff] [blame] | 683 | |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 684 | void __init register_intc_controller(struct intc_desc *desc) |
| 685 | { |
Paul Mundt | 54ff328 | 2009-06-11 10:33:09 +0300 | [diff] [blame] | 686 | unsigned int i, k, smp; |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 687 | struct intc_desc_int *d; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 688 | |
Paul Mundt | 11b6aa9 | 2009-06-12 01:34:12 +0300 | [diff] [blame] | 689 | d = kzalloc(sizeof(*d), GFP_NOWAIT); |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 690 | |
Magnus Damm | 2dcec7a | 2009-04-01 14:30:59 +0000 | [diff] [blame] | 691 | INIT_LIST_HEAD(&d->list); |
| 692 | list_add(&d->list, &intc_list); |
| 693 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 694 | d->nr_reg = desc->mask_regs ? desc->nr_mask_regs * 2 : 0; |
| 695 | d->nr_reg += desc->prio_regs ? desc->nr_prio_regs * 2 : 0; |
| 696 | d->nr_reg += desc->sense_regs ? desc->nr_sense_regs : 0; |
Magnus Damm | d58876e | 2008-04-24 21:36:34 +0900 | [diff] [blame] | 697 | d->nr_reg += desc->ack_regs ? desc->nr_ack_regs : 0; |
Paul Mundt | 9b798d5 | 2009-10-27 11:36:43 +0900 | [diff] [blame] | 698 | |
Paul Mundt | 11b6aa9 | 2009-06-12 01:34:12 +0300 | [diff] [blame] | 699 | d->reg = kzalloc(d->nr_reg * sizeof(*d->reg), GFP_NOWAIT); |
Magnus Damm | f18d533 | 2007-09-21 18:16:42 +0900 | [diff] [blame] | 700 | #ifdef CONFIG_SMP |
Paul Mundt | 11b6aa9 | 2009-06-12 01:34:12 +0300 | [diff] [blame] | 701 | d->smp = kzalloc(d->nr_reg * sizeof(*d->smp), GFP_NOWAIT); |
Magnus Damm | f18d533 | 2007-09-21 18:16:42 +0900 | [diff] [blame] | 702 | #endif |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 703 | k = 0; |
| 704 | |
| 705 | if (desc->mask_regs) { |
| 706 | for (i = 0; i < desc->nr_mask_regs; i++) { |
Magnus Damm | f18d533 | 2007-09-21 18:16:42 +0900 | [diff] [blame] | 707 | smp = IS_SMP(desc->mask_regs[i]); |
| 708 | k += save_reg(d, k, desc->mask_regs[i].set_reg, smp); |
| 709 | k += save_reg(d, k, desc->mask_regs[i].clr_reg, smp); |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 710 | } |
| 711 | } |
| 712 | |
| 713 | if (desc->prio_regs) { |
Paul Mundt | 11b6aa9 | 2009-06-12 01:34:12 +0300 | [diff] [blame] | 714 | d->prio = kzalloc(desc->nr_vectors * sizeof(*d->prio), GFP_NOWAIT); |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 715 | |
| 716 | for (i = 0; i < desc->nr_prio_regs; i++) { |
Magnus Damm | f18d533 | 2007-09-21 18:16:42 +0900 | [diff] [blame] | 717 | smp = IS_SMP(desc->prio_regs[i]); |
| 718 | k += save_reg(d, k, desc->prio_regs[i].set_reg, smp); |
| 719 | k += save_reg(d, k, desc->prio_regs[i].clr_reg, smp); |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 720 | } |
| 721 | } |
| 722 | |
| 723 | if (desc->sense_regs) { |
Paul Mundt | 11b6aa9 | 2009-06-12 01:34:12 +0300 | [diff] [blame] | 724 | d->sense = kzalloc(desc->nr_vectors * sizeof(*d->sense), GFP_NOWAIT); |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 725 | |
| 726 | for (i = 0; i < desc->nr_sense_regs; i++) { |
Magnus Damm | f18d533 | 2007-09-21 18:16:42 +0900 | [diff] [blame] | 727 | k += save_reg(d, k, desc->sense_regs[i].reg, 0); |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 728 | } |
| 729 | } |
| 730 | |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 731 | d->chip.name = desc->name; |
| 732 | d->chip.mask = intc_disable; |
| 733 | d->chip.unmask = intc_enable; |
| 734 | d->chip.mask_ack = intc_disable; |
Magnus Damm | f7dd254 | 2009-04-01 14:20:58 +0000 | [diff] [blame] | 735 | d->chip.enable = intc_enable; |
| 736 | d->chip.disable = intc_disable; |
| 737 | d->chip.shutdown = intc_disable; |
Magnus Damm | 73505b4 | 2007-08-12 15:26:12 +0900 | [diff] [blame] | 738 | d->chip.set_type = intc_set_sense; |
Magnus Damm | 2dcec7a | 2009-04-01 14:30:59 +0000 | [diff] [blame] | 739 | d->chip.set_wake = intc_set_wake; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 740 | |
Magnus Damm | d58876e | 2008-04-24 21:36:34 +0900 | [diff] [blame] | 741 | if (desc->ack_regs) { |
| 742 | for (i = 0; i < desc->nr_ack_regs; i++) |
| 743 | k += save_reg(d, k, desc->ack_regs[i].set_reg, 0); |
| 744 | |
| 745 | d->chip.mask_ack = intc_mask_ack; |
| 746 | } |
Magnus Damm | d58876e | 2008-04-24 21:36:34 +0900 | [diff] [blame] | 747 | |
| 748 | BUG_ON(k > 256); /* _INTC_ADDR_E() and _INTC_ADDR_D() are 8 bits */ |
| 749 | |
Magnus Damm | bdaa6e8 | 2009-02-24 22:58:57 +0900 | [diff] [blame] | 750 | /* register the vectors one by one */ |
| 751 | for (i = 0; i < desc->nr_vectors; i++) { |
| 752 | struct intc_vect *vect = desc->vectors + i; |
Paul Mundt | 05ff300 | 2009-05-22 01:28:33 +0900 | [diff] [blame] | 753 | unsigned int irq = evt2irq(vect->vect); |
| 754 | struct irq_desc *irq_desc; |
Paul Mundt | 54ff328 | 2009-06-11 10:33:09 +0300 | [diff] [blame] | 755 | |
Magnus Damm | bdaa6e8 | 2009-02-24 22:58:57 +0900 | [diff] [blame] | 756 | if (!vect->enum_id) |
| 757 | continue; |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 758 | |
Paul Mundt | 54ff328 | 2009-06-11 10:33:09 +0300 | [diff] [blame] | 759 | irq_desc = irq_to_desc_alloc_node(irq, numa_node_id()); |
Paul Mundt | 05ff300 | 2009-05-22 01:28:33 +0900 | [diff] [blame] | 760 | if (unlikely(!irq_desc)) { |
Paul Mundt | 1279b7f | 2009-08-31 15:15:33 +0900 | [diff] [blame] | 761 | pr_info("can't get irq_desc for %d\n", irq); |
Paul Mundt | 05ff300 | 2009-05-22 01:28:33 +0900 | [diff] [blame] | 762 | continue; |
| 763 | } |
| 764 | |
| 765 | intc_register_irq(desc, d, vect->enum_id, irq); |
Pawel Moll | 05ecd5a | 2009-08-24 19:52:38 +0900 | [diff] [blame] | 766 | |
| 767 | for (k = i + 1; k < desc->nr_vectors; k++) { |
| 768 | struct intc_vect *vect2 = desc->vectors + k; |
| 769 | unsigned int irq2 = evt2irq(vect2->vect); |
| 770 | |
| 771 | if (vect->enum_id != vect2->enum_id) |
| 772 | continue; |
| 773 | |
Paul Mundt | 1279b7f | 2009-08-31 15:15:33 +0900 | [diff] [blame] | 774 | /* |
| 775 | * In the case of multi-evt handling and sparse |
| 776 | * IRQ support, each vector still needs to have |
| 777 | * its own backing irq_desc. |
| 778 | */ |
| 779 | irq_desc = irq_to_desc_alloc_node(irq2, numa_node_id()); |
| 780 | if (unlikely(!irq_desc)) { |
| 781 | pr_info("can't get irq_desc for %d\n", irq2); |
| 782 | continue; |
| 783 | } |
| 784 | |
Pawel Moll | 05ecd5a | 2009-08-24 19:52:38 +0900 | [diff] [blame] | 785 | vect2->enum_id = 0; |
| 786 | |
| 787 | /* redirect this interrupts to the first one */ |
| 788 | set_irq_chip_and_handler_name(irq2, &d->chip, |
| 789 | intc_redirect_irq, "redirect"); |
| 790 | set_irq_data(irq2, (void *)irq); |
| 791 | } |
Magnus Damm | 02ab3f7 | 2007-07-18 17:25:09 +0900 | [diff] [blame] | 792 | } |
| 793 | } |
Magnus Damm | 2dcec7a | 2009-04-01 14:30:59 +0000 | [diff] [blame] | 794 | |
| 795 | static int intc_suspend(struct sys_device *dev, pm_message_t state) |
| 796 | { |
| 797 | struct intc_desc_int *d; |
| 798 | struct irq_desc *desc; |
| 799 | int irq; |
| 800 | |
| 801 | /* get intc controller associated with this sysdev */ |
| 802 | d = container_of(dev, struct intc_desc_int, sysdev); |
| 803 | |
Francesco VIRLINZI | 7fd87b3 | 2009-04-06 07:17:04 +0000 | [diff] [blame] | 804 | switch (state.event) { |
| 805 | case PM_EVENT_ON: |
| 806 | if (d->state.event != PM_EVENT_FREEZE) |
| 807 | break; |
| 808 | for_each_irq_desc(irq, desc) { |
Francesco VIRLINZI | 87a705d | 2009-12-04 08:57:58 +0000 | [diff] [blame] | 809 | if (desc->handle_irq == intc_redirect_irq) |
Paul Mundt | 0a753d5 | 2009-12-09 14:36:16 +0900 | [diff] [blame] | 810 | continue; |
Francesco VIRLINZI | 7fd87b3 | 2009-04-06 07:17:04 +0000 | [diff] [blame] | 811 | if (desc->chip != &d->chip) |
| 812 | continue; |
| 813 | if (desc->status & IRQ_DISABLED) |
| 814 | intc_disable(irq); |
| 815 | else |
| 816 | intc_enable(irq); |
| 817 | } |
| 818 | break; |
| 819 | case PM_EVENT_FREEZE: |
| 820 | /* nothing has to be done */ |
| 821 | break; |
| 822 | case PM_EVENT_SUSPEND: |
| 823 | /* enable wakeup irqs belonging to this intc controller */ |
| 824 | for_each_irq_desc(irq, desc) { |
| 825 | if ((desc->status & IRQ_WAKEUP) && (desc->chip == &d->chip)) |
| 826 | intc_enable(irq); |
| 827 | } |
| 828 | break; |
Magnus Damm | 2dcec7a | 2009-04-01 14:30:59 +0000 | [diff] [blame] | 829 | } |
Francesco VIRLINZI | 7fd87b3 | 2009-04-06 07:17:04 +0000 | [diff] [blame] | 830 | d->state = state; |
Magnus Damm | 2dcec7a | 2009-04-01 14:30:59 +0000 | [diff] [blame] | 831 | |
| 832 | return 0; |
| 833 | } |
| 834 | |
Francesco VIRLINZI | 7fd87b3 | 2009-04-06 07:17:04 +0000 | [diff] [blame] | 835 | static int intc_resume(struct sys_device *dev) |
| 836 | { |
| 837 | return intc_suspend(dev, PMSG_ON); |
| 838 | } |
| 839 | |
Magnus Damm | 2dcec7a | 2009-04-01 14:30:59 +0000 | [diff] [blame] | 840 | static struct sysdev_class intc_sysdev_class = { |
| 841 | .name = "intc", |
| 842 | .suspend = intc_suspend, |
Francesco VIRLINZI | 7fd87b3 | 2009-04-06 07:17:04 +0000 | [diff] [blame] | 843 | .resume = intc_resume, |
Magnus Damm | 2dcec7a | 2009-04-01 14:30:59 +0000 | [diff] [blame] | 844 | }; |
| 845 | |
| 846 | /* register this intc as sysdev to allow suspend/resume */ |
| 847 | static int __init register_intc_sysdevs(void) |
| 848 | { |
| 849 | struct intc_desc_int *d; |
| 850 | int error; |
| 851 | int id = 0; |
| 852 | |
| 853 | error = sysdev_class_register(&intc_sysdev_class); |
| 854 | if (!error) { |
| 855 | list_for_each_entry(d, &intc_list, list) { |
| 856 | d->sysdev.id = id; |
| 857 | d->sysdev.cls = &intc_sysdev_class; |
| 858 | error = sysdev_register(&d->sysdev); |
| 859 | if (error) |
| 860 | break; |
| 861 | id++; |
| 862 | } |
| 863 | } |
| 864 | |
| 865 | if (error) |
| 866 | pr_warning("intc: sysdev registration error\n"); |
| 867 | |
| 868 | return error; |
| 869 | } |
Magnus Damm | 2dcec7a | 2009-04-01 14:30:59 +0000 | [diff] [blame] | 870 | device_initcall(register_intc_sysdevs); |
Paul Mundt | 1ce7b03 | 2009-11-02 10:30:26 +0900 | [diff] [blame] | 871 | |
| 872 | /* |
| 873 | * Dynamic IRQ allocation and deallocation |
| 874 | */ |
| 875 | static unsigned int create_irq_on_node(unsigned int irq_want, int node) |
| 876 | { |
| 877 | unsigned int irq = 0, new; |
| 878 | unsigned long flags; |
| 879 | struct irq_desc *desc; |
| 880 | |
| 881 | spin_lock_irqsave(&vector_lock, flags); |
| 882 | |
| 883 | /* |
| 884 | * First try the wanted IRQ, then scan. |
| 885 | */ |
| 886 | if (test_and_set_bit(irq_want, intc_irq_map)) { |
| 887 | new = find_first_zero_bit(intc_irq_map, nr_irqs); |
| 888 | if (unlikely(new == nr_irqs)) |
| 889 | goto out_unlock; |
| 890 | |
| 891 | desc = irq_to_desc_alloc_node(new, node); |
| 892 | if (unlikely(!desc)) { |
| 893 | pr_info("can't get irq_desc for %d\n", new); |
| 894 | goto out_unlock; |
| 895 | } |
| 896 | |
| 897 | desc = move_irq_desc(desc, node); |
| 898 | __set_bit(new, intc_irq_map); |
| 899 | irq = new; |
| 900 | } |
| 901 | |
| 902 | out_unlock: |
| 903 | spin_unlock_irqrestore(&vector_lock, flags); |
| 904 | |
| 905 | if (irq > 0) |
| 906 | dynamic_irq_init(irq); |
| 907 | |
| 908 | return irq; |
| 909 | } |
| 910 | |
| 911 | int create_irq(void) |
| 912 | { |
| 913 | int nid = cpu_to_node(smp_processor_id()); |
| 914 | int irq; |
| 915 | |
| 916 | irq = create_irq_on_node(NR_IRQS_LEGACY, nid); |
| 917 | if (irq == 0) |
| 918 | irq = -1; |
| 919 | |
| 920 | return irq; |
| 921 | } |
| 922 | |
| 923 | void destroy_irq(unsigned int irq) |
| 924 | { |
| 925 | unsigned long flags; |
| 926 | |
| 927 | dynamic_irq_cleanup(irq); |
| 928 | |
| 929 | spin_lock_irqsave(&vector_lock, flags); |
| 930 | __clear_bit(irq, intc_irq_map); |
| 931 | spin_unlock_irqrestore(&vector_lock, flags); |
| 932 | } |
Paul Mundt | 45b9dea | 2009-11-02 15:43:20 +0900 | [diff] [blame] | 933 | |
| 934 | int reserve_irq_vector(unsigned int irq) |
| 935 | { |
| 936 | unsigned long flags; |
| 937 | int ret = 0; |
| 938 | |
| 939 | spin_lock_irqsave(&vector_lock, flags); |
| 940 | if (test_and_set_bit(irq, intc_irq_map)) |
| 941 | ret = -EBUSY; |
| 942 | spin_unlock_irqrestore(&vector_lock, flags); |
| 943 | |
| 944 | return ret; |
| 945 | } |
| 946 | |
| 947 | void reserve_irq_legacy(void) |
| 948 | { |
| 949 | unsigned long flags; |
| 950 | int i, j; |
| 951 | |
| 952 | spin_lock_irqsave(&vector_lock, flags); |
| 953 | j = find_first_bit(intc_irq_map, nr_irqs); |
| 954 | for (i = 0; i < j; i++) |
| 955 | __set_bit(i, intc_irq_map); |
| 956 | spin_unlock_irqrestore(&vector_lock, flags); |
| 957 | } |