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ARM: OMAP2+: Show bootloader GPMC timings to allow configuring the .dts file
As we still have some devices with GPMC timings missing from the .dts files, let's make it a bit easier to use the bootloader values and print them out. Note that we now need to move the parsing of the device tree provided configuration a bit earlier so we can use that for checking if anything was configured. Acked-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tony Lindgren
parent
9ed7a776eb
commit
35ac051e01
@ -291,6 +291,129 @@ static void gpmc_cs_bool_timings(int cs, const struct gpmc_bool_timings *p)
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p->cycle2cyclediffcsen);
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}
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#ifdef DEBUG
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static int get_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit,
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bool raw, bool noval, int shift,
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const char *name)
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{
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u32 l;
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int nr_bits, max_value, mask;
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l = gpmc_cs_read_reg(cs, reg);
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nr_bits = end_bit - st_bit + 1;
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max_value = (1 << nr_bits) - 1;
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mask = max_value << st_bit;
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l = (l & mask) >> st_bit;
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if (shift)
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l = (shift << l);
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if (noval && (l == 0))
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return 0;
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if (!raw) {
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unsigned int time_ns_min, time_ns, time_ns_max;
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time_ns_min = gpmc_ticks_to_ns(l ? l - 1 : 0);
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time_ns = gpmc_ticks_to_ns(l);
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time_ns_max = gpmc_ticks_to_ns(l + 1 > max_value ?
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max_value : l + 1);
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pr_info("gpmc,%s = <%u> (%u - %u ns, %i ticks)\n",
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name, time_ns, time_ns_min, time_ns_max, l);
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} else {
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pr_info("gpmc,%s = <%u>\n", name, l);
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}
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return l;
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}
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#define GPMC_PRINT_CONFIG(cs, config) \
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pr_info("cs%i %s: 0x%08x\n", cs, #config, \
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gpmc_cs_read_reg(cs, config))
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#define GPMC_GET_RAW(reg, st, end, field) \
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get_gpmc_timing_reg(cs, (reg), (st), (end), 1, 0, 0, field)
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#define GPMC_GET_RAW_BOOL(reg, st, end, field) \
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get_gpmc_timing_reg(cs, (reg), (st), (end), 1, 1, 0, field)
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#define GPMC_GET_RAW_SHIFT(reg, st, end, shift, field) \
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get_gpmc_timing_reg(cs, (reg), (st), (end), 1, 1, (shift), field)
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#define GPMC_GET_TICKS(reg, st, end, field) \
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get_gpmc_timing_reg(cs, (reg), (st), (end), 0, 0, 0, field)
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static void gpmc_show_regs(int cs, const char *desc)
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{
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pr_info("gpmc cs%i %s:\n", cs, desc);
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GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG1);
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GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG2);
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GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG3);
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GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG4);
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GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG5);
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GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG6);
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}
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/*
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* Note that gpmc,wait-pin handing wrongly assumes bit 8 is available,
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* see commit c9fb809.
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*/
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static void gpmc_cs_show_timings(int cs, const char *desc)
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{
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gpmc_show_regs(cs, desc);
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pr_info("gpmc cs%i access configuration:\n", cs);
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GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 4, 4, "time-para-granularity");
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GPMC_GET_RAW(GPMC_CS_CONFIG1, 8, 9, "mux-add-data");
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GPMC_GET_RAW(GPMC_CS_CONFIG1, 12, 13, "device-width");
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GPMC_GET_RAW(GPMC_CS_CONFIG1, 16, 17, "wait-pin");
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GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 21, 21, "wait-on-write");
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GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 22, 22, "wait-on-read");
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GPMC_GET_RAW_SHIFT(GPMC_CS_CONFIG1, 23, 24, 4, "burst-length");
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GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 27, 27, "sync-write");
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GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 28, 28, "burst-write");
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GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 29, 29, "gpmc,sync-read");
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GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 30, 30, "burst-read");
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GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 31, 31, "burst-wrap");
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GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG2, 7, 7, "cs-extra-delay");
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GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG3, 7, 7, "adv-extra-delay");
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GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG4, 23, 23, "we-extra-delay");
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GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG4, 7, 7, "oe-extra-delay");
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GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG6, 7, 7, "cycle2cycle-samecsen");
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GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG6, 6, 6, "cycle2cycle-diffcsen");
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pr_info("gpmc cs%i timings configuration:\n", cs);
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GPMC_GET_TICKS(GPMC_CS_CONFIG2, 0, 3, "cs-on-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG2, 8, 12, "cs-rd-off-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG2, 16, 20, "cs-wr-off-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG3, 0, 3, "adv-on-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG3, 8, 12, "adv-rd-off-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG3, 16, 20, "adv-wr-off-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG4, 0, 3, "oe-on-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG4, 8, 12, "oe-off-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG4, 16, 19, "we-on-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG4, 24, 28, "we-off-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG5, 0, 4, "rd-cycle-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG5, 8, 12, "wr-cycle-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG5, 16, 20, "access-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG5, 24, 27, "page-burst-access-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG6, 0, 3, "bus-turnaround-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG6, 8, 11, "cycle2cycle-delay-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG1, 18, 19, "wait-monitoring-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG1, 25, 26, "clk-activation-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG6, 16, 19, "wr-data-mux-bus-ns");
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GPMC_GET_TICKS(GPMC_CS_CONFIG6, 24, 28, "wr-access-ns");
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}
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#else
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static inline void gpmc_cs_show_timings(int cs, const char *desc)
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{
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}
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#endif
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#ifdef DEBUG
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static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit,
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int time, const char *name)
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@ -361,6 +484,7 @@ int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t)
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int div;
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u32 l;
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gpmc_cs_show_timings(cs, "before gpmc_cs_set_timings");
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div = gpmc_calc_divider(t->sync_clk);
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if (div < 0)
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return div;
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@ -410,6 +534,7 @@ int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t)
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}
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gpmc_cs_bool_timings(cs, &t->bool_timings);
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gpmc_cs_show_timings(cs, "after gpmc_cs_set_timings");
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return 0;
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}
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@ -1571,6 +1696,22 @@ static int gpmc_probe_generic_child(struct platform_device *pdev,
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}
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gpmc_cs_set_name(cs, child->name);
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gpmc_read_settings_dt(child, &gpmc_s);
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gpmc_read_timings_dt(child, &gpmc_t);
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/*
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* For some GPMC devices we still need to rely on the bootloader
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* timings because the devices can be connected via FPGA.
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* REVISIT: Add timing support from slls644g.pdf.
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*/
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if (!gpmc_t.cs_rd_off) {
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WARN(1, "enable GPMC debug to configure .dts timings for CS%i\n",
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cs);
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gpmc_cs_show_timings(cs,
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"please add GPMC bootloader timings to .dts");
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goto no_timings;
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}
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/*
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* For some GPMC devices we still need to rely on the bootloader
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* timings because the devices can be connected via FPGA. So far
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@ -1602,8 +1743,6 @@ static int gpmc_probe_generic_child(struct platform_device *pdev,
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goto err;
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}
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gpmc_read_settings_dt(child, &gpmc_s);
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ret = of_property_read_u32(child, "bank-width", &gpmc_s.device_width);
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if (ret < 0)
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goto err;
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@ -1612,7 +1751,6 @@ static int gpmc_probe_generic_child(struct platform_device *pdev,
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if (ret < 0)
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goto err;
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gpmc_read_timings_dt(child, &gpmc_t);
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gpmc_cs_set_timings(cs, &gpmc_t);
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no_timings:
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