diff options
Diffstat (limited to 'drivers/mcb/mcb-parse.c')
| -rw-r--r-- | drivers/mcb/mcb-parse.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/drivers/mcb/mcb-parse.c b/drivers/mcb/mcb-parse.c new file mode 100644 index 000000000..004926955 --- /dev/null +++ b/drivers/mcb/mcb-parse.c @@ -0,0 +1,160 @@ +#include <linux/types.h> +#include <linux/ioport.h> +#include <linux/slab.h> +#include <linux/export.h> +#include <linux/io.h> +#include <linux/mcb.h> + +#include "mcb-internal.h" + +struct mcb_parse_priv { + phys_addr_t mapbase; + void __iomem *base; +}; + +#define for_each_chameleon_cell(dtype, p) \ + for ((dtype) = get_next_dtype((p)); \ + (dtype) != CHAMELEON_DTYPE_END; \ + (dtype) = get_next_dtype((p))) + +static inline uint32_t get_next_dtype(void __iomem *p) +{ + uint32_t dtype; + + dtype = readl(p); + return dtype >> 28; +} + +static int chameleon_parse_bdd(struct mcb_bus *bus, + phys_addr_t mapbase, + void __iomem *base) +{ + return 0; +} + +static int chameleon_parse_gdd(struct mcb_bus *bus, + phys_addr_t mapbase, + void __iomem *base) +{ + struct chameleon_gdd __iomem *gdd = + (struct chameleon_gdd __iomem *) base; + struct mcb_device *mdev; + u32 offset; + u32 size; + int ret; + __le32 reg1; + __le32 reg2; + + mdev = mcb_alloc_dev(bus); + if (!mdev) + return -ENOMEM; + + reg1 = readl(&gdd->reg1); + reg2 = readl(&gdd->reg2); + offset = readl(&gdd->offset); + size = readl(&gdd->size); + + mdev->id = GDD_DEV(reg1); + mdev->rev = GDD_REV(reg1); + mdev->var = GDD_VAR(reg1); + mdev->bar = GDD_BAR(reg1); + mdev->group = GDD_GRP(reg2); + mdev->inst = GDD_INS(reg2); + + pr_debug("Found a 16z%03d\n", mdev->id); + + mdev->irq.start = GDD_IRQ(reg1); + mdev->irq.end = GDD_IRQ(reg1); + mdev->irq.flags = IORESOURCE_IRQ; + + mdev->mem.start = mapbase + offset; + mdev->mem.end = mdev->mem.start + size - 1; + mdev->mem.flags = IORESOURCE_MEM; + + mdev->is_added = false; + + ret = mcb_device_register(bus, mdev); + if (ret < 0) + goto err; + + return 0; + +err: + mcb_free_dev(mdev); + + return ret; +} + +int chameleon_parse_cells(struct mcb_bus *bus, phys_addr_t mapbase, + void __iomem *base) +{ + char __iomem *p = base; + struct chameleon_fpga_header *header; + uint32_t dtype; + int num_cells = 0; + int ret = 0; + u32 hsize; + + hsize = sizeof(struct chameleon_fpga_header); + + header = kzalloc(hsize, GFP_KERNEL); + if (!header) + return -ENOMEM; + + /* Extract header information */ + memcpy_fromio(header, p, hsize); + /* We only support chameleon v2 at the moment */ + header->magic = le16_to_cpu(header->magic); + if (header->magic != CHAMELEONV2_MAGIC) { + pr_err("Unsupported chameleon version 0x%x\n", + header->magic); + kfree(header); + return -ENODEV; + } + p += hsize; + + pr_debug("header->revision = %d\n", header->revision); + pr_debug("header->model = 0x%x ('%c')\n", header->model, + header->model); + pr_debug("header->minor = %d\n", header->minor); + pr_debug("header->bus_type = 0x%x\n", header->bus_type); + + + pr_debug("header->magic = 0x%x\n", header->magic); + pr_debug("header->filename = \"%.*s\"\n", CHAMELEON_FILENAME_LEN, + header->filename); + + for_each_chameleon_cell(dtype, p) { + switch (dtype) { + case CHAMELEON_DTYPE_GENERAL: + ret = chameleon_parse_gdd(bus, mapbase, p); + if (ret < 0) + goto out; + p += sizeof(struct chameleon_gdd); + break; + case CHAMELEON_DTYPE_BRIDGE: + chameleon_parse_bdd(bus, mapbase, p); + p += sizeof(struct chameleon_bdd); + break; + case CHAMELEON_DTYPE_END: + break; + default: + pr_err("Invalid chameleon descriptor type 0x%x\n", + dtype); + kfree(header); + return -EINVAL; + } + num_cells++; + } + + if (num_cells == 0) + num_cells = -EINVAL; + + kfree(header); + return num_cells; + +out: + kfree(header); + return ret; +} +EXPORT_SYMBOL_GPL(chameleon_parse_cells); |