include/linux/ssb/ssb_driver_gige.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef LINUX_SSB_DRIVER_GIGE_H_
   3 #define LINUX_SSB_DRIVER_GIGE_H_
   4
   5 #include <linux/ssb/ssb.h>
   6 #include <linux/bug.h>
   7 #include <linux/pci.h>
   8 #include <linux/spinlock.h>
   9
  10
  11 #ifdef CONFIG_SSB_DRIVER_GIGE
  12
  13
  14 #define SSB_GIGE_PCIIO                  0x0000 /* PCI I/O Registers (1024 bytes) */
  15 #define SSB_GIGE_RESERVED               0x0400 /* Reserved (1024 bytes) */
  16 #define SSB_GIGE_PCICFG                 0x0800 /* PCI config space (256 bytes) */
  17 #define SSB_GIGE_SHIM_FLUSHSTAT         0x0C00 /* PCI to OCP: Flush status control (32bit) */
  18 #define SSB_GIGE_SHIM_FLUSHRDA          0x0C04 /* PCI to OCP: Flush read address (32bit) */
  19 #define SSB_GIGE_SHIM_FLUSHTO           0x0C08 /* PCI to OCP: Flush timeout counter (32bit) */
  20 #define SSB_GIGE_SHIM_BARRIER           0x0C0C /* PCI to OCP: Barrier register (32bit) */
  21 #define SSB_GIGE_SHIM_MAOCPSI           0x0C10 /* PCI to OCP: MaocpSI Control (32bit) */
  22 #define SSB_GIGE_SHIM_SIOCPMA           0x0C14 /* PCI to OCP: SiocpMa Control (32bit) */
  23
  24 /* TM Status High flags */
  25 #define SSB_GIGE_TMSHIGH_RGMII          0x00010000 /* Have an RGMII PHY-bus */
  26 /* TM Status Low flags */
  27 #define SSB_GIGE_TMSLOW_TXBYPASS        0x00080000 /* TX bypass (no delay) */
  28 #define SSB_GIGE_TMSLOW_RXBYPASS        0x00100000 /* RX bypass (no delay) */
  29 #define SSB_GIGE_TMSLOW_DLLEN           0x01000000 /* Enable DLL controls */
  30
  31 /* Boardflags (low) */
  32 #define SSB_GIGE_BFL_ROBOSWITCH         0x0010
  33
  34
  35 #define SSB_GIGE_MEM_RES_NAME           "SSB Broadcom 47xx GigE memory"
  36 #define SSB_GIGE_IO_RES_NAME            "SSB Broadcom 47xx GigE I/O"
  37
  38 struct ssb_gige {
  39         struct ssb_device *dev;
  40
  41         spinlock_t lock;
  42
  43         /* True, if the device has an RGMII bus.
  44          * False, if the device has a GMII bus. */
  45         bool has_rgmii;
  46
  47         /* The PCI controller device. */
  48         struct pci_controller pci_controller;
  49         struct pci_ops pci_ops;
  50         struct resource mem_resource;
  51         struct resource io_resource;
  52 };
  53
  54 /* Check whether a PCI device is a SSB Gigabit Ethernet core. */
  55 extern bool pdev_is_ssb_gige_core(struct pci_dev *pdev);
  56
  57 /* Convert a pci_dev pointer to a ssb_gige pointer. */
  58 static inline struct ssb_gige * pdev_to_ssb_gige(struct pci_dev *pdev)
  59 {
  60         if (!pdev_is_ssb_gige_core(pdev))
  61                 return NULL;
  62         return container_of(pdev->bus->ops, struct ssb_gige, pci_ops);
  63 }
  64
  65 /* Returns whether the PHY is connected by an RGMII bus. */
  66 static inline bool ssb_gige_is_rgmii(struct pci_dev *pdev)
  67 {
  68         struct ssb_gige *dev = pdev_to_ssb_gige(pdev);
  69         return (dev ? dev->has_rgmii : 0);
  70 }
  71
  72 /* Returns whether we have a Roboswitch. */
  73 static inline bool ssb_gige_have_roboswitch(struct pci_dev *pdev)
  74 {
  75         struct ssb_gige *dev = pdev_to_ssb_gige(pdev);
  76         if (dev)
  77                 return !!(dev->dev->bus->sprom.boardflags_lo &
  78                           SSB_GIGE_BFL_ROBOSWITCH);
  79         return 0;
  80 }
  81
  82 /* Returns whether we can only do one DMA at once. */
  83 static inline bool ssb_gige_one_dma_at_once(struct pci_dev *pdev)
  84 {
  85         struct ssb_gige *dev = pdev_to_ssb_gige(pdev);
  86         if (dev)
  87                 return ((dev->dev->bus->chip_id == 0x4785) &&
  88                         (dev->dev->bus->chip_rev < 2));
  89         return 0;
  90 }
  91
  92 /* Returns whether we must flush posted writes. */
  93 static inline bool ssb_gige_must_flush_posted_writes(struct pci_dev *pdev)
  94 {
  95         struct ssb_gige *dev = pdev_to_ssb_gige(pdev);
  96         if (dev)
  97                 return (dev->dev->bus->chip_id == 0x4785);
  98         return 0;
  99 }
 100
 101 /* Get the device MAC address */
 102 static inline int ssb_gige_get_macaddr(struct pci_dev *pdev, u8 *macaddr)
 103 {
 104         struct ssb_gige *dev = pdev_to_ssb_gige(pdev);
 105         if (!dev)
 106                 return -ENODEV;
 107
 108         memcpy(macaddr, dev->dev->bus->sprom.et0mac, 6);
 109         return 0;
 110 }
 111
 112 /* Get the device phy address */
 113 static inline int ssb_gige_get_phyaddr(struct pci_dev *pdev)
 114 {
 115         struct ssb_gige *dev = pdev_to_ssb_gige(pdev);
 116         if (!dev)
 117                 return -ENODEV;
 118
 119         return dev->dev->bus->sprom.et0phyaddr;
 120 }
 121
 122 extern int ssb_gige_pcibios_plat_dev_init(struct ssb_device *sdev,
 123                                           struct pci_dev *pdev);
 124 extern int ssb_gige_map_irq(struct ssb_device *sdev,
 125                             const struct pci_dev *pdev);
 126
 127 /* The GigE driver is not a standalone module, because we don't have support
 128  * for unregistering the driver. So we could not unload the module anyway. */
 129 extern int ssb_gige_init(void);
 130 static inline void ssb_gige_exit(void)
 131 {
 132         /* Currently we can not unregister the GigE driver,
 133          * because we can not unregister the PCI bridge. */
 134         BUG();
 135 }
 136
 137
 138 #else /* CONFIG_SSB_DRIVER_GIGE */
 139 /* Gigabit Ethernet driver disabled */
 140
 141
 142 static inline int ssb_gige_pcibios_plat_dev_init(struct ssb_device *sdev,
 143                                                  struct pci_dev *pdev)
 144 {
 145         return -ENOSYS;
 146 }
 147 static inline int ssb_gige_map_irq(struct ssb_device *sdev,
 148                                    const struct pci_dev *pdev)
 149 {
 150         return -ENOSYS;
 151 }
 152 static inline int ssb_gige_init(void)
 153 {
 154         return 0;
 155 }
 156 static inline void ssb_gige_exit(void)
 157 {
 158 }
 159
 160 static inline bool pdev_is_ssb_gige_core(struct pci_dev *pdev)
 161 {
 162         return 0;
 163 }
 164 static inline struct ssb_gige * pdev_to_ssb_gige(struct pci_dev *pdev)
 165 {
 166         return NULL;
 167 }
 168 static inline bool ssb_gige_is_rgmii(struct pci_dev *pdev)
 169 {
 170         return 0;
 171 }
 172 static inline bool ssb_gige_have_roboswitch(struct pci_dev *pdev)
 173 {
 174         return 0;
 175 }
 176 static inline bool ssb_gige_one_dma_at_once(struct pci_dev *pdev)
 177 {
 178         return 0;
 179 }
 180 static inline bool ssb_gige_must_flush_posted_writes(struct pci_dev *pdev)
 181 {
 182         return 0;
 183 }
 184 static inline int ssb_gige_get_macaddr(struct pci_dev *pdev, u8 *macaddr)
 185 {
 186         return -ENODEV;
 187 }
 188 static inline int ssb_gige_get_phyaddr(struct pci_dev *pdev)
 189 {
 190         return -ENODEV;
 191 }
 192
 193 #endif /* CONFIG_SSB_DRIVER_GIGE */
 194 #endif /* LINUX_SSB_DRIVER_GIGE_H_ */