2 * QEMU PowerPC PowerNV LPC controller
4 * Copyright (c) 2016, IBM Corporation.
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
20 #include "qemu/osdep.h"
21 #include "sysemu/sysemu.h"
22 #include "target-ppc/cpu.h"
23 #include "qapi/error.h"
26 #include "hw/ppc/pnv.h"
27 #include "hw/ppc/pnv_lpc.h"
28 #include "hw/ppc/pnv_xscom.h"
29 #include "hw/ppc/fdt.h"
40 /* OPB Master LS registers */
41 #define OPB_MASTER_LS_IRQ_STAT 0x50
42 #define OPB_MASTER_IRQ_LPC 0x00000800
43 #define OPB_MASTER_LS_IRQ_MASK 0x54
44 #define OPB_MASTER_LS_IRQ_POL 0x58
45 #define OPB_MASTER_LS_IRQ_INPUT 0x5c
47 /* LPC HC registers */
48 #define LPC_HC_FW_SEG_IDSEL 0x24
49 #define LPC_HC_FW_RD_ACC_SIZE 0x28
50 #define LPC_HC_FW_RD_1B 0x00000000
51 #define LPC_HC_FW_RD_2B 0x01000000
52 #define LPC_HC_FW_RD_4B 0x02000000
53 #define LPC_HC_FW_RD_16B 0x04000000
54 #define LPC_HC_FW_RD_128B 0x07000000
55 #define LPC_HC_IRQSER_CTRL 0x30
56 #define LPC_HC_IRQSER_EN 0x80000000
57 #define LPC_HC_IRQSER_QMODE 0x40000000
58 #define LPC_HC_IRQSER_START_MASK 0x03000000
59 #define LPC_HC_IRQSER_START_4CLK 0x00000000
60 #define LPC_HC_IRQSER_START_6CLK 0x01000000
61 #define LPC_HC_IRQSER_START_8CLK 0x02000000
62 #define LPC_HC_IRQMASK 0x34 /* same bit defs as LPC_HC_IRQSTAT */
63 #define LPC_HC_IRQSTAT 0x38
64 #define LPC_HC_IRQ_SERIRQ0 0x80000000 /* all bits down to ... */
65 #define LPC_HC_IRQ_SERIRQ16 0x00008000 /* IRQ16=IOCHK#, IRQ2=SMI# */
66 #define LPC_HC_IRQ_SERIRQ_ALL 0xffff8000
67 #define LPC_HC_IRQ_LRESET 0x00000400
68 #define LPC_HC_IRQ_SYNC_ABNORM_ERR 0x00000080
69 #define LPC_HC_IRQ_SYNC_NORESP_ERR 0x00000040
70 #define LPC_HC_IRQ_SYNC_NORM_ERR 0x00000020
71 #define LPC_HC_IRQ_SYNC_TIMEOUT_ERR 0x00000010
72 #define LPC_HC_IRQ_SYNC_TARG_TAR_ERR 0x00000008
73 #define LPC_HC_IRQ_SYNC_BM_TAR_ERR 0x00000004
74 #define LPC_HC_IRQ_SYNC_BM0_REQ 0x00000002
75 #define LPC_HC_IRQ_SYNC_BM1_REQ 0x00000001
76 #define LPC_HC_ERROR_ADDRESS 0x40
78 #define LPC_OPB_SIZE 0x100000000ull
80 #define ISA_IO_SIZE 0x00010000
81 #define ISA_MEM_SIZE 0x10000000
82 #define LPC_IO_OPB_ADDR 0xd0010000
83 #define LPC_IO_OPB_SIZE 0x00010000
84 #define LPC_MEM_OPB_ADDR 0xe0010000
85 #define LPC_MEM_OPB_SIZE 0x10000000
86 #define LPC_FW_OPB_ADDR 0xf0000000
87 #define LPC_FW_OPB_SIZE 0x10000000
89 #define LPC_OPB_REGS_OPB_ADDR 0xc0010000
90 #define LPC_OPB_REGS_OPB_SIZE 0x00002000
91 #define LPC_HC_REGS_OPB_ADDR 0xc0012000
92 #define LPC_HC_REGS_OPB_SIZE 0x00001000
96 * TODO: the "primary" cell should only be added on chip 0. This is
97 * how skiboot chooses the default LPC controller on multichip
100 * It would be easly done if we can change the populate() interface to
101 * replace the PnvXScomInterface parameter by a PnvChip one
103 static int pnv_lpc_populate(PnvXScomInterface *dev, void *fdt, int xscom_offset)
105 const char compat[] = "ibm,power8-lpc\0ibm,lpc";
108 uint32_t lpc_pcba = PNV_XSCOM_LPC_BASE;
110 cpu_to_be32(lpc_pcba),
111 cpu_to_be32(PNV_XSCOM_LPC_SIZE)
114 name = g_strdup_printf("isa@%x", lpc_pcba);
115 offset = fdt_add_subnode(fdt, xscom_offset, name);
119 _FDT((fdt_setprop(fdt, offset, "reg", reg, sizeof(reg))));
120 _FDT((fdt_setprop_cell(fdt, offset, "#address-cells", 2)));
121 _FDT((fdt_setprop_cell(fdt, offset, "#size-cells", 1)));
122 _FDT((fdt_setprop(fdt, offset, "primary", NULL, 0)));
123 _FDT((fdt_setprop(fdt, offset, "compatible", compat, sizeof(compat))));
128 * These read/write handlers of the OPB address space should be common
129 * with the P9 LPC Controller which uses direct MMIOs.
131 * TODO: rework to use address_space_stq() and address_space_ldq()
134 static bool opb_read(PnvLpcController *lpc, uint32_t addr, uint8_t *data,
139 /* XXX Handle access size limits and FW read caching here */
140 success = !address_space_rw(&lpc->opb_as, addr, MEMTXATTRS_UNSPECIFIED,
146 static bool opb_write(PnvLpcController *lpc, uint32_t addr, uint8_t *data,
151 /* XXX Handle access size limits here */
152 success = !address_space_rw(&lpc->opb_as, addr, MEMTXATTRS_UNSPECIFIED,
158 #define ECCB_CTL_READ (1ull << (63 - 15))
159 #define ECCB_CTL_SZ_LSH (63 - 7)
160 #define ECCB_CTL_SZ_MASK (0xfull << ECCB_CTL_SZ_LSH)
161 #define ECCB_CTL_ADDR_MASK 0xffffffffu;
163 #define ECCB_STAT_OP_DONE (1ull << (63 - 52))
164 #define ECCB_STAT_OP_ERR (1ull << (63 - 52))
165 #define ECCB_STAT_RD_DATA_LSH (63 - 37)
166 #define ECCB_STAT_RD_DATA_MASK (0xffffffff << ECCB_STAT_RD_DATA_LSH)
168 static void pnv_lpc_do_eccb(PnvLpcController *lpc, uint64_t cmd)
170 /* XXX Check for magic bits at the top, addr size etc... */
171 unsigned int sz = (cmd & ECCB_CTL_SZ_MASK) >> ECCB_CTL_SZ_LSH;
172 uint32_t opb_addr = cmd & ECCB_CTL_ADDR_MASK;
176 if (cmd & ECCB_CTL_READ) {
177 success = opb_read(lpc, opb_addr, data, sz);
179 lpc->eccb_stat_reg = ECCB_STAT_OP_DONE |
180 (((uint64_t)data[0]) << 24 |
181 ((uint64_t)data[1]) << 16 |
182 ((uint64_t)data[2]) << 8 |
183 ((uint64_t)data[3])) << ECCB_STAT_RD_DATA_LSH;
185 lpc->eccb_stat_reg = ECCB_STAT_OP_DONE |
186 (0xffffffffull << ECCB_STAT_RD_DATA_LSH);
189 data[0] = lpc->eccb_data_reg >> 24;
190 data[1] = lpc->eccb_data_reg >> 16;
191 data[2] = lpc->eccb_data_reg >> 8;
192 data[3] = lpc->eccb_data_reg;
194 success = opb_write(lpc, opb_addr, data, sz);
195 lpc->eccb_stat_reg = ECCB_STAT_OP_DONE;
197 /* XXX Which error bit (if any) to signal OPB error ? */
200 static uint64_t pnv_lpc_xscom_read(void *opaque, hwaddr addr, unsigned size)
202 PnvLpcController *lpc = PNV_LPC(opaque);
203 uint32_t offset = addr >> 3;
206 switch (offset & 3) {
212 val = lpc->eccb_stat_reg;
213 lpc->eccb_stat_reg = 0;
216 val = ((uint64_t)lpc->eccb_data_reg) << 32;
222 static void pnv_lpc_xscom_write(void *opaque, hwaddr addr,
223 uint64_t val, unsigned size)
225 PnvLpcController *lpc = PNV_LPC(opaque);
226 uint32_t offset = addr >> 3;
228 switch (offset & 3) {
230 pnv_lpc_do_eccb(lpc, val);
238 lpc->eccb_data_reg = val >> 32;
243 static const MemoryRegionOps pnv_lpc_xscom_ops = {
244 .read = pnv_lpc_xscom_read,
245 .write = pnv_lpc_xscom_write,
246 .valid.min_access_size = 8,
247 .valid.max_access_size = 8,
248 .impl.min_access_size = 8,
249 .impl.max_access_size = 8,
250 .endianness = DEVICE_BIG_ENDIAN,
253 static uint64_t lpc_hc_read(void *opaque, hwaddr addr, unsigned size)
255 PnvLpcController *lpc = opaque;
256 uint64_t val = 0xfffffffffffffffful;
259 case LPC_HC_FW_SEG_IDSEL:
260 val = lpc->lpc_hc_fw_seg_idsel;
262 case LPC_HC_FW_RD_ACC_SIZE:
263 val = lpc->lpc_hc_fw_rd_acc_size;
265 case LPC_HC_IRQSER_CTRL:
266 val = lpc->lpc_hc_irqser_ctrl;
269 val = lpc->lpc_hc_irqmask;
272 val = lpc->lpc_hc_irqstat;
274 case LPC_HC_ERROR_ADDRESS:
275 val = lpc->lpc_hc_error_addr;
278 qemu_log_mask(LOG_UNIMP, "LPC HC Unimplemented register: Ox%"
279 HWADDR_PRIx "\n", addr);
284 static void lpc_hc_write(void *opaque, hwaddr addr, uint64_t val,
287 PnvLpcController *lpc = opaque;
289 /* XXX Filter out reserved bits */
292 case LPC_HC_FW_SEG_IDSEL:
293 /* XXX Actually figure out how that works as this impact
294 * memory regions/aliases
296 lpc->lpc_hc_fw_seg_idsel = val;
298 case LPC_HC_FW_RD_ACC_SIZE:
299 lpc->lpc_hc_fw_rd_acc_size = val;
301 case LPC_HC_IRQSER_CTRL:
302 lpc->lpc_hc_irqser_ctrl = val;
305 lpc->lpc_hc_irqmask = val;
308 lpc->lpc_hc_irqstat &= ~val;
310 case LPC_HC_ERROR_ADDRESS:
313 qemu_log_mask(LOG_UNIMP, "LPC HC Unimplemented register: Ox%"
314 HWADDR_PRIx "\n", addr);
318 static const MemoryRegionOps lpc_hc_ops = {
320 .write = lpc_hc_write,
321 .endianness = DEVICE_BIG_ENDIAN,
323 .min_access_size = 4,
324 .max_access_size = 4,
327 .min_access_size = 4,
328 .max_access_size = 4,
332 static uint64_t opb_master_read(void *opaque, hwaddr addr, unsigned size)
334 PnvLpcController *lpc = opaque;
335 uint64_t val = 0xfffffffffffffffful;
338 case OPB_MASTER_LS_IRQ_STAT:
339 val = lpc->opb_irq_stat;
341 case OPB_MASTER_LS_IRQ_MASK:
342 val = lpc->opb_irq_mask;
344 case OPB_MASTER_LS_IRQ_POL:
345 val = lpc->opb_irq_pol;
347 case OPB_MASTER_LS_IRQ_INPUT:
348 val = lpc->opb_irq_input;
351 qemu_log_mask(LOG_UNIMP, "OPB MASTER Unimplemented register: Ox%"
352 HWADDR_PRIx "\n", addr);
358 static void opb_master_write(void *opaque, hwaddr addr,
359 uint64_t val, unsigned size)
361 PnvLpcController *lpc = opaque;
364 case OPB_MASTER_LS_IRQ_STAT:
365 lpc->opb_irq_stat &= ~val;
367 case OPB_MASTER_LS_IRQ_MASK:
368 /* XXX Filter out reserved bits */
369 lpc->opb_irq_mask = val;
371 case OPB_MASTER_LS_IRQ_POL:
372 /* XXX Filter out reserved bits */
373 lpc->opb_irq_pol = val;
375 case OPB_MASTER_LS_IRQ_INPUT:
379 qemu_log_mask(LOG_UNIMP, "OPB MASTER Unimplemented register: Ox%"
380 HWADDR_PRIx "\n", addr);
384 static const MemoryRegionOps opb_master_ops = {
385 .read = opb_master_read,
386 .write = opb_master_write,
387 .endianness = DEVICE_BIG_ENDIAN,
389 .min_access_size = 4,
390 .max_access_size = 4,
393 .min_access_size = 4,
394 .max_access_size = 4,
398 static void pnv_lpc_realize(DeviceState *dev, Error **errp)
400 PnvLpcController *lpc = PNV_LPC(dev);
403 lpc->lpc_hc_fw_rd_acc_size = LPC_HC_FW_RD_4B;
405 /* Create address space and backing MR for the OPB bus */
406 memory_region_init(&lpc->opb_mr, OBJECT(dev), "lpc-opb", 0x100000000ull);
407 address_space_init(&lpc->opb_as, &lpc->opb_mr, "lpc-opb");
409 /* Create ISA IO and Mem space regions which are the root of
410 * the ISA bus (ie, ISA address spaces). We don't create a
411 * separate one for FW which we alias to memory.
413 memory_region_init(&lpc->isa_io, OBJECT(dev), "isa-io", ISA_IO_SIZE);
414 memory_region_init(&lpc->isa_mem, OBJECT(dev), "isa-mem", ISA_MEM_SIZE);
416 /* Create windows from the OPB space to the ISA space */
417 memory_region_init_alias(&lpc->opb_isa_io, OBJECT(dev), "lpc-isa-io",
418 &lpc->isa_io, 0, LPC_IO_OPB_SIZE);
419 memory_region_add_subregion(&lpc->opb_mr, LPC_IO_OPB_ADDR,
421 memory_region_init_alias(&lpc->opb_isa_mem, OBJECT(dev), "lpc-isa-mem",
422 &lpc->isa_mem, 0, LPC_MEM_OPB_SIZE);
423 memory_region_add_subregion(&lpc->opb_mr, LPC_MEM_OPB_ADDR,
425 memory_region_init_alias(&lpc->opb_isa_fw, OBJECT(dev), "lpc-isa-fw",
426 &lpc->isa_mem, 0, LPC_FW_OPB_SIZE);
427 memory_region_add_subregion(&lpc->opb_mr, LPC_FW_OPB_ADDR,
430 /* Create MMIO regions for LPC HC and OPB registers */
431 memory_region_init_io(&lpc->opb_master_regs, OBJECT(dev), &opb_master_ops,
432 lpc, "lpc-opb-master", LPC_OPB_REGS_OPB_SIZE);
433 memory_region_add_subregion(&lpc->opb_mr, LPC_OPB_REGS_OPB_ADDR,
434 &lpc->opb_master_regs);
435 memory_region_init_io(&lpc->lpc_hc_regs, OBJECT(dev), &lpc_hc_ops, lpc,
436 "lpc-hc", LPC_HC_REGS_OPB_SIZE);
437 memory_region_add_subregion(&lpc->opb_mr, LPC_HC_REGS_OPB_ADDR,
440 /* XScom region for LPC registers */
441 pnv_xscom_region_init(&lpc->xscom_regs, OBJECT(dev),
442 &pnv_lpc_xscom_ops, lpc, "xscom-lpc",
446 static void pnv_lpc_class_init(ObjectClass *klass, void *data)
448 DeviceClass *dc = DEVICE_CLASS(klass);
449 PnvXScomInterfaceClass *xdc = PNV_XSCOM_INTERFACE_CLASS(klass);
451 xdc->populate = pnv_lpc_populate;
453 dc->realize = pnv_lpc_realize;
456 static const TypeInfo pnv_lpc_info = {
457 .name = TYPE_PNV_LPC,
458 .parent = TYPE_DEVICE,
459 .instance_size = sizeof(PnvLpcController),
460 .class_init = pnv_lpc_class_init,
461 .interfaces = (InterfaceInfo[]) {
462 { TYPE_PNV_XSCOM_INTERFACE },
467 static void pnv_lpc_register_types(void)
469 type_register_static(&pnv_lpc_info);
472 type_init(pnv_lpc_register_types)