pcie-designware.h 6.0 KB

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  1. /*
  2. * Synopsys Designware PCIe host controller driver
  3. *
  4. * Copyright (C) 2013 Samsung Electronics Co., Ltd.
  5. * http://www.samsung.com
  6. *
  7. * Author: Jingoo Han <jg1.han@samsung.com>
  8. *
  9. * This program is free software; you can redistribute it and/or modify
  10. * it under the terms of the GNU General Public License version 2 as
  11. * published by the Free Software Foundation.
  12. */
  13. #ifndef _PCIE_DESIGNWARE_H
  14. #define _PCIE_DESIGNWARE_H
  15. #include <linux/irq.h>
  16. #include <linux/msi.h>
  17. #include <linux/pci.h>
  18. /* Parameters for the waiting for link up routine */
  19. #define LINK_WAIT_MAX_RETRIES 10
  20. #define LINK_WAIT_USLEEP_MIN 90000
  21. #define LINK_WAIT_USLEEP_MAX 100000
  22. /* Parameters for the waiting for iATU enabled routine */
  23. #define LINK_WAIT_MAX_IATU_RETRIES 5
  24. #define LINK_WAIT_IATU_MIN 9000
  25. #define LINK_WAIT_IATU_MAX 10000
  26. /* Synopsys-specific PCIe configuration registers */
  27. #define PCIE_PORT_LINK_CONTROL 0x710
  28. #define PORT_LINK_MODE_MASK (0x3f << 16)
  29. #define PORT_LINK_MODE_1_LANES (0x1 << 16)
  30. #define PORT_LINK_MODE_2_LANES (0x3 << 16)
  31. #define PORT_LINK_MODE_4_LANES (0x7 << 16)
  32. #define PORT_LINK_MODE_8_LANES (0xf << 16)
  33. #define PCIE_LINK_WIDTH_SPEED_CONTROL 0x80C
  34. #define PORT_LOGIC_SPEED_CHANGE (0x1 << 17)
  35. #define PORT_LOGIC_LINK_WIDTH_MASK (0x1f << 8)
  36. #define PORT_LOGIC_LINK_WIDTH_1_LANES (0x1 << 8)
  37. #define PORT_LOGIC_LINK_WIDTH_2_LANES (0x2 << 8)
  38. #define PORT_LOGIC_LINK_WIDTH_4_LANES (0x4 << 8)
  39. #define PORT_LOGIC_LINK_WIDTH_8_LANES (0x8 << 8)
  40. #define PCIE_MSI_ADDR_LO 0x820
  41. #define PCIE_MSI_ADDR_HI 0x824
  42. #define PCIE_MSI_INTR0_ENABLE 0x828
  43. #define PCIE_MSI_INTR0_MASK 0x82C
  44. #define PCIE_MSI_INTR0_STATUS 0x830
  45. #define PCIE_ATU_VIEWPORT 0x900
  46. #define PCIE_ATU_REGION_INBOUND (0x1 << 31)
  47. #define PCIE_ATU_REGION_OUTBOUND (0x0 << 31)
  48. #define PCIE_ATU_REGION_INDEX2 (0x2 << 0)
  49. #define PCIE_ATU_REGION_INDEX1 (0x1 << 0)
  50. #define PCIE_ATU_REGION_INDEX0 (0x0 << 0)
  51. #define PCIE_ATU_CR1 0x904
  52. #define PCIE_ATU_TYPE_MEM (0x0 << 0)
  53. #define PCIE_ATU_TYPE_IO (0x2 << 0)
  54. #define PCIE_ATU_TYPE_CFG0 (0x4 << 0)
  55. #define PCIE_ATU_TYPE_CFG1 (0x5 << 0)
  56. #define PCIE_ATU_CR2 0x908
  57. #define PCIE_ATU_ENABLE (0x1 << 31)
  58. #define PCIE_ATU_BAR_MODE_ENABLE (0x1 << 30)
  59. #define PCIE_ATU_LOWER_BASE 0x90C
  60. #define PCIE_ATU_UPPER_BASE 0x910
  61. #define PCIE_ATU_LIMIT 0x914
  62. #define PCIE_ATU_LOWER_TARGET 0x918
  63. #define PCIE_ATU_BUS(x) (((x) & 0xff) << 24)
  64. #define PCIE_ATU_DEV(x) (((x) & 0x1f) << 19)
  65. #define PCIE_ATU_FUNC(x) (((x) & 0x7) << 16)
  66. #define PCIE_ATU_UPPER_TARGET 0x91C
  67. /*
  68. * iATU Unroll-specific register definitions
  69. * From 4.80 core version the address translation will be made by unroll
  70. */
  71. #define PCIE_ATU_UNR_REGION_CTRL1 0x00
  72. #define PCIE_ATU_UNR_REGION_CTRL2 0x04
  73. #define PCIE_ATU_UNR_LOWER_BASE 0x08
  74. #define PCIE_ATU_UNR_UPPER_BASE 0x0C
  75. #define PCIE_ATU_UNR_LIMIT 0x10
  76. #define PCIE_ATU_UNR_LOWER_TARGET 0x14
  77. #define PCIE_ATU_UNR_UPPER_TARGET 0x18
  78. /* Register address builder */
  79. #define PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(region) \
  80. ((0x3 << 20) | ((region) << 9))
  81. /*
  82. * Maximum number of MSI IRQs can be 256 per controller. But keep
  83. * it 32 as of now. Probably we will never need more than 32. If needed,
  84. * then increment it in multiple of 32.
  85. */
  86. #define MAX_MSI_IRQS 32
  87. #define MAX_MSI_CTRLS (MAX_MSI_IRQS / 32)
  88. struct pcie_port;
  89. struct dw_pcie;
  90. struct dw_pcie_host_ops {
  91. int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val);
  92. int (*wr_own_conf)(struct pcie_port *pp, int where, int size, u32 val);
  93. int (*rd_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
  94. unsigned int devfn, int where, int size, u32 *val);
  95. int (*wr_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
  96. unsigned int devfn, int where, int size, u32 val);
  97. void (*host_init)(struct pcie_port *pp);
  98. void (*msi_set_irq)(struct pcie_port *pp, int irq);
  99. void (*msi_clear_irq)(struct pcie_port *pp, int irq);
  100. phys_addr_t (*get_msi_addr)(struct pcie_port *pp);
  101. u32 (*get_msi_data)(struct pcie_port *pp, int pos);
  102. void (*scan_bus)(struct pcie_port *pp);
  103. int (*msi_host_init)(struct pcie_port *pp, struct msi_controller *chip);
  104. };
  105. struct pcie_port {
  106. u8 root_bus_nr;
  107. u64 cfg0_base;
  108. void __iomem *va_cfg0_base;
  109. u32 cfg0_size;
  110. u64 cfg1_base;
  111. void __iomem *va_cfg1_base;
  112. u32 cfg1_size;
  113. resource_size_t io_base;
  114. phys_addr_t io_bus_addr;
  115. u32 io_size;
  116. u64 mem_base;
  117. phys_addr_t mem_bus_addr;
  118. u32 mem_size;
  119. struct resource *cfg;
  120. struct resource *io;
  121. struct resource *mem;
  122. struct resource *busn;
  123. int irq;
  124. struct dw_pcie_host_ops *ops;
  125. int msi_irq;
  126. struct irq_domain *irq_domain;
  127. unsigned long msi_data;
  128. DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS);
  129. };
  130. struct dw_pcie_ops {
  131. u32 (*readl_dbi)(struct dw_pcie *pcie, u32 reg);
  132. void (*writel_dbi)(struct dw_pcie *pcie, u32 reg, u32 val);
  133. int (*link_up)(struct dw_pcie *pcie);
  134. };
  135. struct dw_pcie {
  136. struct device *dev;
  137. void __iomem *dbi_base;
  138. u32 num_viewport;
  139. u8 iatu_unroll_enabled;
  140. struct pcie_port pp;
  141. const struct dw_pcie_ops *ops;
  142. };
  143. #define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp)
  144. int dw_pcie_read(void __iomem *addr, int size, u32 *val);
  145. int dw_pcie_write(void __iomem *addr, int size, u32 val);
  146. u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg);
  147. void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val);
  148. int dw_pcie_link_up(struct dw_pcie *pci);
  149. int dw_pcie_wait_for_link(struct dw_pcie *pci);
  150. void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
  151. int type, u64 cpu_addr, u64 pci_addr,
  152. u32 size);
  153. void dw_pcie_setup(struct dw_pcie *pci);
  154. #ifdef CONFIG_PCIE_DW_HOST
  155. irqreturn_t dw_handle_msi_irq(struct pcie_port *pp);
  156. void dw_pcie_msi_init(struct pcie_port *pp);
  157. void dw_pcie_setup_rc(struct pcie_port *pp);
  158. int dw_pcie_host_init(struct pcie_port *pp);
  159. #else
  160. static inline irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
  161. {
  162. return IRQ_NONE;
  163. }
  164. static inline void dw_pcie_msi_init(struct pcie_port *pp)
  165. {
  166. }
  167. static inline void dw_pcie_setup_rc(struct pcie_port *pp)
  168. {
  169. }
  170. static inline int dw_pcie_host_init(struct pcie_port *pp)
  171. {
  172. return 0;
  173. }
  174. #endif
  175. #endif /* _PCIE_DESIGNWARE_H */