| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Benjamin Herrenschmidt | 5899 | 98.74% | 2 | 10.00% |
| Tejun Heo | 17 | 0.28% | 4 | 20.00% |
| David Gibson | 15 | 0.25% | 1 | 5.00% |
| Bartlomiej Zolnierkiewicz | 8 | 0.13% | 1 | 5.00% |
| Luis de Bethencourt | 7 | 0.12% | 1 | 5.00% |
| Christoph Hellwig | 6 | 0.10% | 1 | 5.00% |
| Yangtao Li | 5 | 0.08% | 1 | 5.00% |
| Björn Helgaas | 3 | 0.05% | 1 | 5.00% |
| Joe Perches | 3 | 0.05% | 2 | 10.00% |
| Jingoo Han | 3 | 0.05% | 1 | 5.00% |
| Grant C. Likely | 3 | 0.05% | 1 | 5.00% |
| SF Markus Elfring | 2 | 0.03% | 1 | 5.00% |
| Rob Herring | 1 | 0.02% | 1 | 5.00% |
| Bhumika Goyal | 1 | 0.02% | 1 | 5.00% |
| Thomas Gleixner | 1 | 0.02% | 1 | 5.00% |
| Total | 5974 | 20 |
// SPDX-License-Identifier: GPL-2.0-only /* * Libata based driver for Apple "macio" family of PATA controllers * * Copyright 2008/2009 Benjamin Herrenschmidt, IBM Corp * <benh@kernel.crashing.org> * * Some bits and pieces from drivers/ide/ppc/pmac.c * */ #undef DEBUG #undef DEBUG_DMA #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/blkdev.h> #include <linux/ata.h> #include <linux/libata.h> #include <linux/adb.h> #include <linux/pmu.h> #include <linux/scatterlist.h> #include <linux/of.h> #include <linux/gfp.h> #include <linux/pci.h> #include <scsi/scsi.h> #include <scsi/scsi_host.h> #include <scsi/scsi_device.h> #include <asm/macio.h> #include <asm/io.h> #include <asm/dbdma.h> #include <asm/machdep.h> #include <asm/pmac_feature.h> #include <asm/mediabay.h> #ifdef DEBUG_DMA #define dev_dbgdma(dev, format, arg...) \ dev_printk(KERN_DEBUG , dev , format , ## arg) #else #define dev_dbgdma(dev, format, arg...) \ ({ if (0) dev_printk(KERN_DEBUG, dev, format, ##arg); 0; }) #endif #define DRV_NAME "pata_macio" #define DRV_VERSION "0.9" /* Models of macio ATA controller */ enum { controller_ohare, /* OHare based */ controller_heathrow, /* Heathrow/Paddington */ controller_kl_ata3, /* KeyLargo ATA-3 */ controller_kl_ata4, /* KeyLargo ATA-4 */ controller_un_ata6, /* UniNorth2 ATA-6 */ controller_k2_ata6, /* K2 ATA-6 */ controller_sh_ata6, /* Shasta ATA-6 */ }; static const char* macio_ata_names[] = { "OHare ATA", /* OHare based */ "Heathrow ATA", /* Heathrow/Paddington */ "KeyLargo ATA-3", /* KeyLargo ATA-3 (MDMA only) */ "KeyLargo ATA-4", /* KeyLargo ATA-4 (UDMA/66) */ "UniNorth ATA-6", /* UniNorth2 ATA-6 (UDMA/100) */ "K2 ATA-6", /* K2 ATA-6 (UDMA/100) */ "Shasta ATA-6", /* Shasta ATA-6 (UDMA/133) */ }; /* * Extra registers, both 32-bit little-endian */ #define IDE_TIMING_CONFIG 0x200 #define IDE_INTERRUPT 0x300 /* Kauai (U2) ATA has different register setup */ #define IDE_KAUAI_PIO_CONFIG 0x200 #define IDE_KAUAI_ULTRA_CONFIG 0x210 #define IDE_KAUAI_POLL_CONFIG 0x220 /* * Timing configuration register definitions */ /* Number of IDE_SYSCLK_NS ticks, argument is in nanoseconds */ #define SYSCLK_TICKS(t) (((t) + IDE_SYSCLK_NS - 1) / IDE_SYSCLK_NS) #define SYSCLK_TICKS_66(t) (((t) + IDE_SYSCLK_66_NS - 1) / IDE_SYSCLK_66_NS) #define IDE_SYSCLK_NS 30 /* 33Mhz cell */ #define IDE_SYSCLK_66_NS 15 /* 66Mhz cell */ /* 133Mhz cell, found in shasta. * See comments about 100 Mhz Uninorth 2... * Note that PIO_MASK and MDMA_MASK seem to overlap, that's just * weird and I don't now why .. at this stage */ #define TR_133_PIOREG_PIO_MASK 0xff000fff #define TR_133_PIOREG_MDMA_MASK 0x00fff800 #define TR_133_UDMAREG_UDMA_MASK 0x0003ffff #define TR_133_UDMAREG_UDMA_EN 0x00000001 /* 100Mhz cell, found in Uninorth 2 and K2. It appears as a pci device * (106b/0033) on uninorth or K2 internal PCI bus and it's clock is * controlled like gem or fw. It appears to be an evolution of keylargo * ATA4 with a timing register extended to 2x32bits registers (one * for PIO & MWDMA and one for UDMA, and a similar DBDMA channel. * It has it's own local feature control register as well. * * After scratching my mind over the timing values, at least for PIO * and MDMA, I think I've figured the format of the timing register, * though I use pre-calculated tables for UDMA as usual... */ #define TR_100_PIO_ADDRSETUP_MASK 0xff000000 /* Size of field unknown */ #define TR_100_PIO_ADDRSETUP_SHIFT 24 #define TR_100_MDMA_MASK 0x00fff000 #define TR_100_MDMA_RECOVERY_MASK 0x00fc0000 #define TR_100_MDMA_RECOVERY_SHIFT 18 #define TR_100_MDMA_ACCESS_MASK 0x0003f000 #define TR_100_MDMA_ACCESS_SHIFT 12 #define TR_100_PIO_MASK 0xff000fff #define TR_100_PIO_RECOVERY_MASK 0x00000fc0 #define TR_100_PIO_RECOVERY_SHIFT 6 #define TR_100_PIO_ACCESS_MASK 0x0000003f #define TR_100_PIO_ACCESS_SHIFT 0 #define TR_100_UDMAREG_UDMA_MASK 0x0000ffff #define TR_100_UDMAREG_UDMA_EN 0x00000001 /* 66Mhz cell, found in KeyLargo. Can do ultra mode 0 to 2 on * 40 connector cable and to 4 on 80 connector one. * Clock unit is 15ns (66Mhz) * * 3 Values can be programmed: * - Write data setup, which appears to match the cycle time. They * also call it DIOW setup. * - Ready to pause time (from spec) * - Address setup. That one is weird. I don't see where exactly * it fits in UDMA cycles, I got it's name from an obscure piece * of commented out code in Darwin. They leave it to 0, we do as * well, despite a comment that would lead to think it has a * min value of 45ns. * Apple also add 60ns to the write data setup (or cycle time ?) on * reads. */ #define TR_66_UDMA_MASK 0xfff00000 #define TR_66_UDMA_EN 0x00100000 /* Enable Ultra mode for DMA */ #define TR_66_PIO_ADDRSETUP_MASK 0xe0000000 /* Address setup */ #define TR_66_PIO_ADDRSETUP_SHIFT 29 #define TR_66_UDMA_RDY2PAUS_MASK 0x1e000000 /* Ready 2 pause time */ #define TR_66_UDMA_RDY2PAUS_SHIFT 25 #define TR_66_UDMA_WRDATASETUP_MASK 0x01e00000 /* Write data setup time */ #define TR_66_UDMA_WRDATASETUP_SHIFT 21 #define TR_66_MDMA_MASK 0x000ffc00 #define TR_66_MDMA_RECOVERY_MASK 0x000f8000 #define TR_66_MDMA_RECOVERY_SHIFT 15 #define TR_66_MDMA_ACCESS_MASK 0x00007c00 #define TR_66_MDMA_ACCESS_SHIFT 10 #define TR_66_PIO_MASK 0xe00003ff #define TR_66_PIO_RECOVERY_MASK 0x000003e0 #define TR_66_PIO_RECOVERY_SHIFT 5 #define TR_66_PIO_ACCESS_MASK 0x0000001f #define TR_66_PIO_ACCESS_SHIFT 0 /* 33Mhz cell, found in OHare, Heathrow (& Paddington) and KeyLargo * Can do pio & mdma modes, clock unit is 30ns (33Mhz) * * The access time and recovery time can be programmed. Some older * Darwin code base limit OHare to 150ns cycle time. I decided to do * the same here fore safety against broken old hardware ;) * The HalfTick bit, when set, adds half a clock (15ns) to the access * time and removes one from recovery. It's not supported on KeyLargo * implementation afaik. The E bit appears to be set for PIO mode 0 and * is used to reach long timings used in this mode. */ #define TR_33_MDMA_MASK 0x003ff800 #define TR_33_MDMA_RECOVERY_MASK 0x001f0000 #define TR_33_MDMA_RECOVERY_SHIFT 16 #define TR_33_MDMA_ACCESS_MASK 0x0000f800 #define TR_33_MDMA_ACCESS_SHIFT 11 #define TR_33_MDMA_HALFTICK 0x00200000 #define TR_33_PIO_MASK 0x000007ff #define TR_33_PIO_E 0x00000400 #define TR_33_PIO_RECOVERY_MASK 0x000003e0 #define TR_33_PIO_RECOVERY_SHIFT 5 #define TR_33_PIO_ACCESS_MASK 0x0000001f #define TR_33_PIO_ACCESS_SHIFT 0 /* * Interrupt register definitions. Only present on newer cells * (Keylargo and later afaik) so we don't use it. */ #define IDE_INTR_DMA 0x80000000 #define IDE_INTR_DEVICE 0x40000000 /* * FCR Register on Kauai. Not sure what bit 0x4 is ... */ #define KAUAI_FCR_UATA_MAGIC 0x00000004 #define KAUAI_FCR_UATA_RESET_N 0x00000002 #define KAUAI_FCR_UATA_ENABLE 0x00000001 /* Allow up to 256 DBDMA commands per xfer */ #define MAX_DCMDS 256 /* Don't let a DMA segment go all the way to 64K */ #define MAX_DBDMA_SEG 0xff00 /* * Wait 1s for disk to answer on IDE bus after a hard reset * of the device (via GPIO/FCR). * * Some devices seem to "pollute" the bus even after dropping * the BSY bit (typically some combo drives slave on the UDMA * bus) after a hard reset. Since we hard reset all drives on * KeyLargo ATA66, we have to keep that delay around. I may end * up not hard resetting anymore on these and keep the delay only * for older interfaces instead (we have to reset when coming * from MacOS...) --BenH. */ #define IDE_WAKEUP_DELAY_MS 1000 struct pata_macio_timing; struct pata_macio_priv { int kind; int aapl_bus_id; int mediabay : 1; struct device_node *node; struct macio_dev *mdev; struct pci_dev *pdev; struct device *dev; int irq; u32 treg[2][2]; void __iomem *tfregs; void __iomem *kauai_fcr; struct dbdma_cmd * dma_table_cpu; dma_addr_t dma_table_dma; struct ata_host *host; const struct pata_macio_timing *timings; }; /* Previous variants of this driver used to calculate timings * for various variants of the chip and use tables for others. * * Not only was this confusing, but in addition, it isn't clear * whether our calculation code was correct. It didn't entirely * match the darwin code and whatever documentation I could find * on these cells * * I decided to entirely rely on a table instead for this version * of the driver. Also, because I don't really care about derated * modes and really old HW other than making it work, I'm not going * to calculate / snoop timing values for something else than the * standard modes. */ struct pata_macio_timing { int mode; u32 reg1; /* Bits to set in first timing reg */ u32 reg2; /* Bits to set in second timing reg */ }; static const struct pata_macio_timing pata_macio_ohare_timings[] = { { XFER_PIO_0, 0x00000526, 0, }, { XFER_PIO_1, 0x00000085, 0, }, { XFER_PIO_2, 0x00000025, 0, }, { XFER_PIO_3, 0x00000025, 0, }, { XFER_PIO_4, 0x00000025, 0, }, { XFER_MW_DMA_0, 0x00074000, 0, }, { XFER_MW_DMA_1, 0x00221000, 0, }, { XFER_MW_DMA_2, 0x00211000, 0, }, { -1, 0, 0 } }; static const struct pata_macio_timing pata_macio_heathrow_timings[] = { { XFER_PIO_0, 0x00000526, 0, }, { XFER_PIO_1, 0x00000085, 0, }, { XFER_PIO_2, 0x00000025, 0, }, { XFER_PIO_3, 0x00000025, 0, }, { XFER_PIO_4, 0x00000025, 0, }, { XFER_MW_DMA_0, 0x00074000, 0, }, { XFER_MW_DMA_1, 0x00221000, 0, }, { XFER_MW_DMA_2, 0x00211000, 0, }, { -1, 0, 0 } }; static const struct pata_macio_timing pata_macio_kl33_timings[] = { { XFER_PIO_0, 0x00000526, 0, }, { XFER_PIO_1, 0x00000085, 0, }, { XFER_PIO_2, 0x00000025, 0, }, { XFER_PIO_3, 0x00000025, 0, }, { XFER_PIO_4, 0x00000025, 0, }, { XFER_MW_DMA_0, 0x00084000, 0, }, { XFER_MW_DMA_1, 0x00021800, 0, }, { XFER_MW_DMA_2, 0x00011800, 0, }, { -1, 0, 0 } }; static const struct pata_macio_timing pata_macio_kl66_timings[] = { { XFER_PIO_0, 0x0000038c, 0, }, { XFER_PIO_1, 0x0000020a, 0, }, { XFER_PIO_2, 0x00000127, 0, }, { XFER_PIO_3, 0x000000c6, 0, }, { XFER_PIO_4, 0x00000065, 0, }, { XFER_MW_DMA_0, 0x00084000, 0, }, { XFER_MW_DMA_1, 0x00029800, 0, }, { XFER_MW_DMA_2, 0x00019400, 0, }, { XFER_UDMA_0, 0x19100000, 0, }, { XFER_UDMA_1, 0x14d00000, 0, }, { XFER_UDMA_2, 0x10900000, 0, }, { XFER_UDMA_3, 0x0c700000, 0, }, { XFER_UDMA_4, 0x0c500000, 0, }, { -1, 0, 0 } }; static const struct pata_macio_timing pata_macio_kauai_timings[] = { { XFER_PIO_0, 0x08000a92, 0, }, { XFER_PIO_1, 0x0800060f, 0, }, { XFER_PIO_2, 0x0800038b, 0, }, { XFER_PIO_3, 0x05000249, 0, }, { XFER_PIO_4, 0x04000148, 0, }, { XFER_MW_DMA_0, 0x00618000, 0, }, { XFER_MW_DMA_1, 0x00209000, 0, }, { XFER_MW_DMA_2, 0x00148000, 0, }, { XFER_UDMA_0, 0, 0x000070c1, }, { XFER_UDMA_1, 0, 0x00005d81, }, { XFER_UDMA_2, 0, 0x00004a61, }, { XFER_UDMA_3, 0, 0x00003a51, }, { XFER_UDMA_4, 0, 0x00002a31, }, { XFER_UDMA_5, 0, 0x00002921, }, { -1, 0, 0 } }; static const struct pata_macio_timing pata_macio_shasta_timings[] = { { XFER_PIO_0, 0x0a000c97, 0, }, { XFER_PIO_1, 0x07000712, 0, }, { XFER_PIO_2, 0x040003cd, 0, }, { XFER_PIO_3, 0x0500028b, 0, }, { XFER_PIO_4, 0x0400010a, 0, }, { XFER_MW_DMA_0, 0x00820800, 0, }, { XFER_MW_DMA_1, 0x0028b000, 0, }, { XFER_MW_DMA_2, 0x001ca000, 0, }, { XFER_UDMA_0, 0, 0x00035901, }, { XFER_UDMA_1, 0, 0x000348b1, }, { XFER_UDMA_2, 0, 0x00033881, }, { XFER_UDMA_3, 0, 0x00033861, }, { XFER_UDMA_4, 0, 0x00033841, }, { XFER_UDMA_5, 0, 0x00033031, }, { XFER_UDMA_6, 0, 0x00033021, }, { -1, 0, 0 } }; static const struct pata_macio_timing *pata_macio_find_timing( struct pata_macio_priv *priv, int mode) { int i; for (i = 0; priv->timings[i].mode > 0; i++) { if (priv->timings[i].mode == mode) return &priv->timings[i]; } return NULL; } static void pata_macio_apply_timings(struct ata_port *ap, unsigned int device) { struct pata_macio_priv *priv = ap->private_data; void __iomem *rbase = ap->ioaddr.cmd_addr; if (priv->kind == controller_sh_ata6 || priv->kind == controller_un_ata6 || priv->kind == controller_k2_ata6) { writel(priv->treg[device][0], rbase + IDE_KAUAI_PIO_CONFIG); writel(priv->treg[device][1], rbase + IDE_KAUAI_ULTRA_CONFIG); } else writel(priv->treg[device][0], rbase + IDE_TIMING_CONFIG); } static void pata_macio_dev_select(struct ata_port *ap, unsigned int device) { ata_sff_dev_select(ap, device); /* Apply timings */ pata_macio_apply_timings(ap, device); } static void pata_macio_set_timings(struct ata_port *ap, struct ata_device *adev) { struct pata_macio_priv *priv = ap->private_data; const struct pata_macio_timing *t; dev_dbg(priv->dev, "Set timings: DEV=%d,PIO=0x%x (%s),DMA=0x%x (%s)\n", adev->devno, adev->pio_mode, ata_mode_string(ata_xfer_mode2mask(adev->pio_mode)), adev->dma_mode, ata_mode_string(ata_xfer_mode2mask(adev->dma_mode))); /* First clear timings */ priv->treg[adev->devno][0] = priv->treg[adev->devno][1] = 0; /* Now get the PIO timings */ t = pata_macio_find_timing(priv, adev->pio_mode); if (t == NULL) { dev_warn(priv->dev, "Invalid PIO timing requested: 0x%x\n", adev->pio_mode); t = pata_macio_find_timing(priv, XFER_PIO_0); } BUG_ON(t == NULL); /* PIO timings only ever use the first treg */ priv->treg[adev->devno][0] |= t->reg1; /* Now get DMA timings */ t = pata_macio_find_timing(priv, adev->dma_mode); if (t == NULL || (t->reg1 == 0 && t->reg2 == 0)) { dev_dbg(priv->dev, "DMA timing not set yet, using MW_DMA_0\n"); t = pata_macio_find_timing(priv, XFER_MW_DMA_0); } BUG_ON(t == NULL); /* DMA timings can use both tregs */ priv->treg[adev->devno][0] |= t->reg1; priv->treg[adev->devno][1] |= t->reg2; dev_dbg(priv->dev, " -> %08x %08x\n", priv->treg[adev->devno][0], priv->treg[adev->devno][1]); /* Apply to hardware */ pata_macio_apply_timings(ap, adev->devno); } /* * Blast some well known "safe" values to the timing registers at init or * wakeup from sleep time, before we do real calculation */ static void pata_macio_default_timings(struct pata_macio_priv *priv) { unsigned int value, value2 = 0; switch(priv->kind) { case controller_sh_ata6: value = 0x0a820c97; value2 = 0x00033031; break; case controller_un_ata6: case controller_k2_ata6: value = 0x08618a92; value2 = 0x00002921; break; case controller_kl_ata4: value = 0x0008438c; break; case controller_kl_ata3: value = 0x00084526; break; case controller_heathrow: case controller_ohare: default: value = 0x00074526; break; } priv->treg[0][0] = priv->treg[1][0] = value; priv->treg[0][1] = priv->treg[1][1] = value2; } static int pata_macio_cable_detect(struct ata_port *ap) { struct pata_macio_priv *priv = ap->private_data; /* Get cable type from device-tree */ if (priv->kind == controller_kl_ata4 || priv->kind == controller_un_ata6 || priv->kind == controller_k2_ata6 || priv->kind == controller_sh_ata6) { const char* cable = of_get_property(priv->node, "cable-type", NULL); struct device_node *root = of_find_node_by_path("/"); const char *model = of_get_property(root, "model", NULL); of_node_put(root); if (cable && !strncmp(cable, "80-", 3)) { /* Some drives fail to detect 80c cable in PowerBook * These machine use proprietary short IDE cable * anyway */ if (!strncmp(model, "PowerBook", 9)) return ATA_CBL_PATA40_SHORT; else return ATA_CBL_PATA80; } } /* G5's seem to have incorrect cable type in device-tree. * Let's assume they always have a 80 conductor cable, this seem to * be always the case unless the user mucked around */ if (of_device_is_compatible(priv->node, "K2-UATA") || of_device_is_compatible(priv->node, "shasta-ata")) return ATA_CBL_PATA80; /* Anything else is 40 connectors */ return ATA_CBL_PATA40; } static void pata_macio_qc_prep(struct ata_queued_cmd *qc) { unsigned int write = (qc->tf.flags & ATA_TFLAG_WRITE); struct ata_port *ap = qc->ap; struct pata_macio_priv *priv = ap->private_data; struct scatterlist *sg; struct dbdma_cmd *table; unsigned int si, pi; dev_dbgdma(priv->dev, "%s: qc %p flags %lx, write %d dev %d\n", __func__, qc, qc->flags, write, qc->dev->devno); if (!(qc->flags & ATA_QCFLAG_DMAMAP)) return; table = (struct dbdma_cmd *) priv->dma_table_cpu; pi = 0; for_each_sg(qc->sg, sg, qc->n_elem, si) { u32 addr, sg_len, len; /* determine if physical DMA addr spans 64K boundary. * Note h/w doesn't support 64-bit, so we unconditionally * truncate dma_addr_t to u32. */ addr = (u32) sg_dma_address(sg); sg_len = sg_dma_len(sg); while (sg_len) { /* table overflow should never happen */ BUG_ON (pi++ >= MAX_DCMDS); len = (sg_len < MAX_DBDMA_SEG) ? sg_len : MAX_DBDMA_SEG; table->command = cpu_to_le16(write ? OUTPUT_MORE: INPUT_MORE); table->req_count = cpu_to_le16(len); table->phy_addr = cpu_to_le32(addr); table->cmd_dep = 0; table->xfer_status = 0; table->res_count = 0; addr += len; sg_len -= len; ++table; } } /* Should never happen according to Tejun */ BUG_ON(!pi); /* Convert the last command to an input/output */ table--; table->command = cpu_to_le16(write ? OUTPUT_LAST: INPUT_LAST); table++; /* Add the stop command to the end of the list */ memset(table, 0, sizeof(struct dbdma_cmd)); table->command = cpu_to_le16(DBDMA_STOP); dev_dbgdma(priv->dev, "%s: %d DMA list entries\n", __func__, pi); } static void pata_macio_freeze(struct ata_port *ap) { struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr; if (dma_regs) { unsigned int timeout = 1000000; /* Make sure DMA controller is stopped */ writel((RUN|PAUSE|FLUSH|WAKE|DEAD) << 16, &dma_regs->control); while (--timeout && (readl(&dma_regs->status) & RUN)) udelay(1); } ata_sff_freeze(ap); } static void pata_macio_bmdma_setup(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; struct pata_macio_priv *priv = ap->private_data; struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr; int dev = qc->dev->devno; dev_dbgdma(priv->dev, "%s: qc %p\n", __func__, qc); /* Make sure DMA commands updates are visible */ writel(priv->dma_table_dma, &dma_regs->cmdptr); /* On KeyLargo 66Mhz cell, we need to add 60ns to wrDataSetup on * UDMA reads */ if (priv->kind == controller_kl_ata4 && (priv->treg[dev][0] & TR_66_UDMA_EN)) { void __iomem *rbase = ap->ioaddr.cmd_addr; u32 reg = priv->treg[dev][0]; if (!(qc->tf.flags & ATA_TFLAG_WRITE)) reg += 0x00800000; writel(reg, rbase + IDE_TIMING_CONFIG); } /* issue r/w command */ ap->ops->sff_exec_command(ap, &qc->tf); } static void pata_macio_bmdma_start(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; struct pata_macio_priv *priv = ap->private_data; struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr; dev_dbgdma(priv->dev, "%s: qc %p\n", __func__, qc); writel((RUN << 16) | RUN, &dma_regs->control); /* Make sure it gets to the controller right now */ (void)readl(&dma_regs->control); } static void pata_macio_bmdma_stop(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; struct pata_macio_priv *priv = ap->private_data; struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr; unsigned int timeout = 1000000; dev_dbgdma(priv->dev, "%s: qc %p\n", __func__, qc); /* Stop the DMA engine and wait for it to full halt */ writel (((RUN|WAKE|DEAD) << 16), &dma_regs->control); while (--timeout && (readl(&dma_regs->status) & RUN)) udelay(1); } static u8 pata_macio_bmdma_status(struct ata_port *ap) { struct pata_macio_priv *priv = ap->private_data; struct dbdma_regs __iomem *dma_regs = ap->ioaddr.bmdma_addr; u32 dstat, rstat = ATA_DMA_INTR; unsigned long timeout = 0; dstat = readl(&dma_regs->status); dev_dbgdma(priv->dev, "%s: dstat=%x\n", __func__, dstat); /* We have two things to deal with here: * * - The dbdma won't stop if the command was started * but completed with an error without transferring all * datas. This happens when bad blocks are met during * a multi-block transfer. * * - The dbdma fifo hasn't yet finished flushing to * to system memory when the disk interrupt occurs. * */ /* First check for errors */ if ((dstat & (RUN|DEAD)) != RUN) rstat |= ATA_DMA_ERR; /* If ACTIVE is cleared, the STOP command has been hit and * the transfer is complete. If not, we have to flush the * channel. */ if ((dstat & ACTIVE) == 0) return rstat; dev_dbgdma(priv->dev, "%s: DMA still active, flushing...\n", __func__); /* If dbdma didn't execute the STOP command yet, the * active bit is still set. We consider that we aren't * sharing interrupts (which is hopefully the case with * those controllers) and so we just try to flush the * channel for pending data in the fifo */ udelay(1); writel((FLUSH << 16) | FLUSH, &dma_regs->control); for (;;) { udelay(1); dstat = readl(&dma_regs->status); if ((dstat & FLUSH) == 0) break; if (++timeout > 1000) { dev_warn(priv->dev, "timeout flushing DMA\n"); rstat |= ATA_DMA_ERR; break; } } return rstat; } /* port_start is when we allocate the DMA command list */ static int pata_macio_port_start(struct ata_port *ap) { struct pata_macio_priv *priv = ap->private_data; if (ap->ioaddr.bmdma_addr == NULL) return 0; /* Allocate space for the DBDMA commands. * * The +2 is +1 for the stop command and +1 to allow for * aligning the start address to a multiple of 16 bytes. */ priv->dma_table_cpu = dmam_alloc_coherent(priv->dev, (MAX_DCMDS + 2) * sizeof(struct dbdma_cmd), &priv->dma_table_dma, GFP_KERNEL); if (priv->dma_table_cpu == NULL) { dev_err(priv->dev, "Unable to allocate DMA command list\n"); ap->ioaddr.bmdma_addr = NULL; ap->mwdma_mask = 0; ap->udma_mask = 0; } return 0; } static void pata_macio_irq_clear(struct ata_port *ap) { struct pata_macio_priv *priv = ap->private_data; /* Nothing to do here */ dev_dbgdma(priv->dev, "%s\n", __func__); } static void pata_macio_reset_hw(struct pata_macio_priv *priv, int resume) { dev_dbg(priv->dev, "Enabling & resetting... \n"); if (priv->mediabay) return; if (priv->kind == controller_ohare && !resume) { /* The code below is having trouble on some ohare machines * (timing related ?). Until I can put my hand on one of these * units, I keep the old way */ ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, priv->node, 0, 1); } else { int rc; /* Reset and enable controller */ rc = ppc_md.feature_call(PMAC_FTR_IDE_RESET, priv->node, priv->aapl_bus_id, 1); ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, priv->node, priv->aapl_bus_id, 1); msleep(10); /* Only bother waiting if there's a reset control */ if (rc == 0) { ppc_md.feature_call(PMAC_FTR_IDE_RESET, priv->node, priv->aapl_bus_id, 0); msleep(IDE_WAKEUP_DELAY_MS); } } /* If resuming a PCI device, restore the config space here */ if (priv->pdev && resume) { int rc; pci_restore_state(priv->pdev); rc = pcim_enable_device(priv->pdev); if (rc) dev_err(&priv->pdev->dev, "Failed to enable device after resume (%d)\n", rc); else pci_set_master(priv->pdev); } /* On Kauai, initialize the FCR. We don't perform a reset, doesn't really * seem necessary and speeds up the boot process */ if (priv->kauai_fcr) writel(KAUAI_FCR_UATA_MAGIC | KAUAI_FCR_UATA_RESET_N | KAUAI_FCR_UATA_ENABLE, priv->kauai_fcr); } /* Hook the standard slave config to fixup some HW related alignment * restrictions */ static int pata_macio_slave_config(struct scsi_device *sdev) { struct ata_port *ap = ata_shost_to_port(sdev->host); struct pata_macio_priv *priv = ap->private_data; struct ata_device *dev; u16 cmd; int rc; /* First call original */ rc = ata_scsi_slave_config(sdev); if (rc) return rc; /* This is lifted from sata_nv */ dev = &ap->link.device[sdev->id]; /* OHare has issues with non cache aligned DMA on some chipsets */ if (priv->kind == controller_ohare) { blk_queue_update_dma_alignment(sdev->request_queue, 31); blk_queue_update_dma_pad(sdev->request_queue, 31); /* Tell the world about it */ ata_dev_info(dev, "OHare alignment limits applied\n"); return 0; } /* We only have issues with ATAPI */ if (dev->class != ATA_DEV_ATAPI) return 0; /* Shasta and K2 seem to have "issues" with reads ... */ if (priv->kind == controller_sh_ata6 || priv->kind == controller_k2_ata6) { /* Allright these are bad, apply restrictions */ blk_queue_update_dma_alignment(sdev->request_queue, 15); blk_queue_update_dma_pad(sdev->request_queue, 15); /* We enable MWI and hack cache line size directly here, this * is specific to this chipset and not normal values, we happen * to somewhat know what we are doing here (which is basically * to do the same Apple does and pray they did not get it wrong :-) */ BUG_ON(!priv->pdev); pci_write_config_byte(priv->pdev, PCI_CACHE_LINE_SIZE, 0x08); pci_read_config_word(priv->pdev, PCI_COMMAND, &cmd); pci_write_config_word(priv->pdev, PCI_COMMAND, cmd | PCI_COMMAND_INVALIDATE); /* Tell the world about it */ ata_dev_info(dev, "K2/Shasta alignment limits applied\n"); } return 0; } #ifdef CONFIG_PM_SLEEP static int pata_macio_do_suspend(struct pata_macio_priv *priv, pm_message_t mesg) { int rc; /* First, core libata suspend to do most of the work */ rc = ata_host_suspend(priv->host, mesg); if (rc) return rc; /* Restore to default timings */ pata_macio_default_timings(priv); /* Mask interrupt. Not strictly necessary but old driver did * it and I'd rather not change that here */ disable_irq(priv->irq); /* The media bay will handle itself just fine */ if (priv->mediabay) return 0; /* Kauai has bus control FCRs directly here */ if (priv->kauai_fcr) { u32 fcr = readl(priv->kauai_fcr); fcr &= ~(KAUAI_FCR_UATA_RESET_N | KAUAI_FCR_UATA_ENABLE); writel(fcr, priv->kauai_fcr); } /* For PCI, save state and disable DMA. No need to call * pci_set_power_state(), the HW doesn't do D states that * way, the platform code will take care of suspending the * ASIC properly */ if (priv->pdev) { pci_save_state(priv->pdev); pci_disable_device(priv->pdev); } /* Disable the bus on older machines and the cell on kauai */ ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, priv->node, priv->aapl_bus_id, 0); return 0; } static int pata_macio_do_resume(struct pata_macio_priv *priv) { /* Reset and re-enable the HW */ pata_macio_reset_hw(priv, 1); /* Sanitize drive timings */ pata_macio_apply_timings(priv->host->ports[0], 0); /* We want our IRQ back ! */ enable_irq(priv->irq); /* Let the libata core take it from there */ ata_host_resume(priv->host); return 0; } #endif /* CONFIG_PM_SLEEP */ static struct scsi_host_template pata_macio_sht = { ATA_BASE_SHT(DRV_NAME), .sg_tablesize = MAX_DCMDS, /* We may not need that strict one */ .dma_boundary = ATA_DMA_BOUNDARY, /* Not sure what the real max is but we know it's less than 64K, let's * use 64K minus 256 */ .max_segment_size = MAX_DBDMA_SEG, .slave_configure = pata_macio_slave_config, }; static struct ata_port_operations pata_macio_ops = { .inherits = &ata_bmdma_port_ops, .freeze = pata_macio_freeze, .set_piomode = pata_macio_set_timings, .set_dmamode = pata_macio_set_timings, .cable_detect = pata_macio_cable_detect, .sff_dev_select = pata_macio_dev_select, .qc_prep = pata_macio_qc_prep, .bmdma_setup = pata_macio_bmdma_setup, .bmdma_start = pata_macio_bmdma_start, .bmdma_stop = pata_macio_bmdma_stop, .bmdma_status = pata_macio_bmdma_status, .port_start = pata_macio_port_start, .sff_irq_clear = pata_macio_irq_clear, }; static void pata_macio_invariants(struct pata_macio_priv *priv) { const int *bidp; /* Identify the type of controller */ if (of_device_is_compatible(priv->node, "shasta-ata")) { priv->kind = controller_sh_ata6; priv->timings = pata_macio_shasta_timings; } else if (of_device_is_compatible(priv->node, "kauai-ata")) { priv->kind = controller_un_ata6; priv->timings = pata_macio_kauai_timings; } else if (of_device_is_compatible(priv->node, "K2-UATA")) { priv->kind = controller_k2_ata6; priv->timings = pata_macio_kauai_timings; } else if (of_device_is_compatible(priv->node, "keylargo-ata")) { if (of_node_name_eq(priv->node, "ata-4")) { priv->kind = controller_kl_ata4; priv->timings = pata_macio_kl66_timings; } else { priv->kind = controller_kl_ata3; priv->timings = pata_macio_kl33_timings; } } else if (of_device_is_compatible(priv->node, "heathrow-ata")) { priv->kind = controller_heathrow; priv->timings = pata_macio_heathrow_timings; } else { priv->kind = controller_ohare; priv->timings = pata_macio_ohare_timings; } /* XXX FIXME --- setup priv->mediabay here */ /* Get Apple bus ID (for clock and ASIC control) */ bidp = of_get_property(priv->node, "AAPL,bus-id", NULL); priv->aapl_bus_id = bidp ? *bidp : 0; /* Fixup missing Apple bus ID in case of media-bay */ if (priv->mediabay && bidp == 0) priv->aapl_bus_id = 1; } static void pata_macio_setup_ios(struct ata_ioports *ioaddr, void __iomem * base, void __iomem * dma) { /* cmd_addr is the base of regs for that port */ ioaddr->cmd_addr = base; /* taskfile registers */ ioaddr->data_addr = base + (ATA_REG_DATA << 4); ioaddr->error_addr = base + (ATA_REG_ERR << 4); ioaddr->feature_addr = base + (ATA_REG_FEATURE << 4); ioaddr->nsect_addr = base + (ATA_REG_NSECT << 4); ioaddr->lbal_addr = base + (ATA_REG_LBAL << 4); ioaddr->lbam_addr = base + (ATA_REG_LBAM << 4); ioaddr->lbah_addr = base + (ATA_REG_LBAH << 4); ioaddr->device_addr = base + (ATA_REG_DEVICE << 4); ioaddr->status_addr = base + (ATA_REG_STATUS << 4); ioaddr->command_addr = base + (ATA_REG_CMD << 4); ioaddr->altstatus_addr = base + 0x160; ioaddr->ctl_addr = base + 0x160; ioaddr->bmdma_addr = dma; } static void pmac_macio_calc_timing_masks(struct pata_macio_priv *priv, struct ata_port_info *pinfo) { int i = 0; pinfo->pio_mask = 0; pinfo->mwdma_mask = 0; pinfo->udma_mask = 0; while (priv->timings[i].mode > 0) { unsigned int mask = 1U << (priv->timings[i].mode & 0x0f); switch(priv->timings[i].mode & 0xf0) { case 0x00: /* PIO */ pinfo->pio_mask |= (mask >> 8); break; case 0x20: /* MWDMA */ pinfo->mwdma_mask |= mask; break; case 0x40: /* UDMA */ pinfo->udma_mask |= mask; break; } i++; } dev_dbg(priv->dev, "Supported masks: PIO=%lx, MWDMA=%lx, UDMA=%lx\n", pinfo->pio_mask, pinfo->mwdma_mask, pinfo->udma_mask); } static int pata_macio_common_init(struct pata_macio_priv *priv, resource_size_t tfregs, resource_size_t dmaregs, resource_size_t fcregs, unsigned long irq) { struct ata_port_info pinfo; const struct ata_port_info *ppi[] = { &pinfo, NULL }; void __iomem *dma_regs = NULL; /* Fill up privates with various invariants collected from the * device-tree */ pata_macio_invariants(priv); /* Make sure we have sane initial timings in the cache */ pata_macio_default_timings(priv); /* Allocate libata host for 1 port */ memset(&pinfo, 0, sizeof(struct ata_port_info)); pmac_macio_calc_timing_masks(priv, &pinfo); pinfo.flags = ATA_FLAG_SLAVE_POSS; pinfo.port_ops = &pata_macio_ops; pinfo.private_data = priv; priv->host = ata_host_alloc_pinfo(priv->dev, ppi, 1); if (priv->host == NULL) { dev_err(priv->dev, "Failed to allocate ATA port structure\n"); return -ENOMEM; } /* Setup the private data in host too */ priv->host->private_data = priv; /* Map base registers */ priv->tfregs = devm_ioremap(priv->dev, tfregs, 0x100); if (priv->tfregs == NULL) { dev_err(priv->dev, "Failed to map ATA ports\n"); return -ENOMEM; } priv->host->iomap = &priv->tfregs; /* Map DMA regs */ if (dmaregs != 0) { dma_regs = devm_ioremap(priv->dev, dmaregs, sizeof(struct dbdma_regs)); if (dma_regs == NULL) dev_warn(priv->dev, "Failed to map ATA DMA registers\n"); } /* If chip has local feature control, map those regs too */ if (fcregs != 0) { priv->kauai_fcr = devm_ioremap(priv->dev, fcregs, 4); if (priv->kauai_fcr == NULL) { dev_err(priv->dev, "Failed to map ATA FCR register\n"); return -ENOMEM; } } /* Setup port data structure */ pata_macio_setup_ios(&priv->host->ports[0]->ioaddr, priv->tfregs, dma_regs); priv->host->ports[0]->private_data = priv; /* hard-reset the controller */ pata_macio_reset_hw(priv, 0); pata_macio_apply_timings(priv->host->ports[0], 0); /* Enable bus master if necessary */ if (priv->pdev && dma_regs) pci_set_master(priv->pdev); dev_info(priv->dev, "Activating pata-macio chipset %s, Apple bus ID %d\n", macio_ata_names[priv->kind], priv->aapl_bus_id); /* Start it up */ priv->irq = irq; return ata_host_activate(priv->host, irq, ata_bmdma_interrupt, 0, &pata_macio_sht); } static int pata_macio_attach(struct macio_dev *mdev, const struct of_device_id *match) { struct pata_macio_priv *priv; resource_size_t tfregs, dmaregs = 0; unsigned long irq; int rc; /* Check for broken device-trees */ if (macio_resource_count(mdev) == 0) { dev_err(&mdev->ofdev.dev, "No addresses for controller\n"); return -ENXIO; } /* Enable managed resources */ macio_enable_devres(mdev); /* Allocate and init private data structure */ priv = devm_kzalloc(&mdev->ofdev.dev, sizeof(struct pata_macio_priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->node = of_node_get(mdev->ofdev.dev.of_node); priv->mdev = mdev; priv->dev = &mdev->ofdev.dev; /* Request memory resource for taskfile registers */ if (macio_request_resource(mdev, 0, "pata-macio")) { dev_err(&mdev->ofdev.dev, "Cannot obtain taskfile resource\n"); return -EBUSY; } tfregs = macio_resource_start(mdev, 0); /* Request resources for DMA registers if any */ if (macio_resource_count(mdev) >= 2) { if (macio_request_resource(mdev, 1, "pata-macio-dma")) dev_err(&mdev->ofdev.dev, "Cannot obtain DMA resource\n"); else dmaregs = macio_resource_start(mdev, 1); } /* * Fixup missing IRQ for some old implementations with broken * device-trees. * * This is a bit bogus, it should be fixed in the device-tree itself, * via the existing macio fixups, based on the type of interrupt * controller in the machine. However, I have no test HW for this case, * and this trick works well enough on those old machines... */ if (macio_irq_count(mdev) == 0) { dev_warn(&mdev->ofdev.dev, "No interrupts for controller, using 13\n"); irq = irq_create_mapping(NULL, 13); } else irq = macio_irq(mdev, 0); /* Prevvent media bay callbacks until fully registered */ lock_media_bay(priv->mdev->media_bay); /* Get register addresses and call common initialization */ rc = pata_macio_common_init(priv, tfregs, /* Taskfile regs */ dmaregs, /* DBDMA regs */ 0, /* Feature control */ irq); unlock_media_bay(priv->mdev->media_bay); return rc; } static int pata_macio_detach(struct macio_dev *mdev) { struct ata_host *host = macio_get_drvdata(mdev); struct pata_macio_priv *priv = host->private_data; lock_media_bay(priv->mdev->media_bay); /* Make sure the mediabay callback doesn't try to access * dead stuff */ priv->host->private_data = NULL; ata_host_detach(host); unlock_media_bay(priv->mdev->media_bay); return 0; } #ifdef CONFIG_PM_SLEEP static int pata_macio_suspend(struct macio_dev *mdev, pm_message_t mesg) { struct ata_host *host = macio_get_drvdata(mdev); return pata_macio_do_suspend(host->private_data, mesg); } static int pata_macio_resume(struct macio_dev *mdev) { struct ata_host *host = macio_get_drvdata(mdev); return pata_macio_do_resume(host->private_data); } #endif /* CONFIG_PM_SLEEP */ #ifdef CONFIG_PMAC_MEDIABAY static void pata_macio_mb_event(struct macio_dev* mdev, int mb_state) { struct ata_host *host = macio_get_drvdata(mdev); struct ata_port *ap; struct ata_eh_info *ehi; struct ata_device *dev; unsigned long flags; if (!host || !host->private_data) return; ap = host->ports[0]; spin_lock_irqsave(ap->lock, flags); ehi = &ap->link.eh_info; if (mb_state == MB_CD) { ata_ehi_push_desc(ehi, "mediabay plug"); ata_ehi_hotplugged(ehi); ata_port_freeze(ap); } else { ata_ehi_push_desc(ehi, "mediabay unplug"); ata_for_each_dev(dev, &ap->link, ALL) dev->flags |= ATA_DFLAG_DETACH; ata_port_abort(ap); } spin_unlock_irqrestore(ap->lock, flags); } #endif /* CONFIG_PMAC_MEDIABAY */ static int pata_macio_pci_attach(struct pci_dev *pdev, const struct pci_device_id *id) { struct pata_macio_priv *priv; struct device_node *np; resource_size_t rbase; /* We cannot use a MacIO controller without its OF device node */ np = pci_device_to_OF_node(pdev); if (np == NULL) { dev_err(&pdev->dev, "Cannot find OF device node for controller\n"); return -ENODEV; } /* Check that it can be enabled */ if (pcim_enable_device(pdev)) { dev_err(&pdev->dev, "Cannot enable controller PCI device\n"); return -ENXIO; } /* Allocate and init private data structure */ priv = devm_kzalloc(&pdev->dev, sizeof(struct pata_macio_priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->node = of_node_get(np); priv->pdev = pdev; priv->dev = &pdev->dev; /* Get MMIO regions */ if (pci_request_regions(pdev, "pata-macio")) { dev_err(&pdev->dev, "Cannot obtain PCI resources\n"); return -EBUSY; } /* Get register addresses and call common initialization */ rbase = pci_resource_start(pdev, 0); if (pata_macio_common_init(priv, rbase + 0x2000, /* Taskfile regs */ rbase + 0x1000, /* DBDMA regs */ rbase, /* Feature control */ pdev->irq)) return -ENXIO; return 0; } static void pata_macio_pci_detach(struct pci_dev *pdev) { struct ata_host *host = pci_get_drvdata(pdev); ata_host_detach(host); } #ifdef CONFIG_PM_SLEEP static int pata_macio_pci_suspend(struct pci_dev *pdev, pm_message_t mesg) { struct ata_host *host = pci_get_drvdata(pdev); return pata_macio_do_suspend(host->private_data, mesg); } static int pata_macio_pci_resume(struct pci_dev *pdev) { struct ata_host *host = pci_get_drvdata(pdev); return pata_macio_do_resume(host->private_data); } #endif /* CONFIG_PM_SLEEP */ static const struct of_device_id pata_macio_match[] = { { .name = "IDE", }, { .name = "ATA", }, { .type = "ide", }, { .type = "ata", }, {}, }; MODULE_DEVICE_TABLE(of, pata_macio_match); static struct macio_driver pata_macio_driver = { .driver = { .name = "pata-macio", .owner = THIS_MODULE, .of_match_table = pata_macio_match, }, .probe = pata_macio_attach, .remove = pata_macio_detach, #ifdef CONFIG_PM_SLEEP .suspend = pata_macio_suspend, .resume = pata_macio_resume, #endif #ifdef CONFIG_PMAC_MEDIABAY .mediabay_event = pata_macio_mb_event, #endif }; static const struct pci_device_id pata_macio_pci_match[] = { { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_UNI_N_ATA), 0 }, { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID_ATA100), 0 }, { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_K2_ATA100), 0 }, { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_SH_ATA), 0 }, { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID2_ATA), 0 }, {}, }; static struct pci_driver pata_macio_pci_driver = { .name = "pata-pci-macio", .id_table = pata_macio_pci_match, .probe = pata_macio_pci_attach, .remove = pata_macio_pci_detach, #ifdef CONFIG_PM_SLEEP .suspend = pata_macio_pci_suspend, .resume = pata_macio_pci_resume, #endif .driver = { .owner = THIS_MODULE, }, }; MODULE_DEVICE_TABLE(pci, pata_macio_pci_match); static int __init pata_macio_init(void) { int rc; if (!machine_is(powermac)) return -ENODEV; rc = pci_register_driver(&pata_macio_pci_driver); if (rc) return rc; rc = macio_register_driver(&pata_macio_driver); if (rc) { pci_unregister_driver(&pata_macio_pci_driver); return rc; } return 0; } static void __exit pata_macio_exit(void) { macio_unregister_driver(&pata_macio_driver); pci_unregister_driver(&pata_macio_pci_driver); } module_init(pata_macio_init); module_exit(pata_macio_exit); MODULE_AUTHOR("Benjamin Herrenschmidt"); MODULE_DESCRIPTION("Apple MacIO PATA driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION);
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